Torque Wrench Extension Calculator

What is Torque Wrench Extension Adjustment?

A torque wrench extension calculator is a vital tool for anyone performing mechanical work requiring precise tightening of fasteners. When you use an extension adapter between your torque wrench and the socket, it changes the leverage acting on the wrench. This change in leverage means the torque applied at the fastener will not be the same as the setting on your torque wrench. Without accounting for this, you risk under-tightening or over-tightening, both of which can lead to critical component failure, stripped threads, or even accidents. Understanding torque wrench extension adjustment is crucial for achieving accurate and safe results in automotive, aerospace, construction, and many other fields. This topic is fundamental for both professional mechanics and diligent DIY enthusiasts.

Who should use it?
Anyone using a torque wrench with any form of extension, including U-joints, wobble extensions, or simply a long socket extension, should use this calculator. This applies to automotive repair, engine building, bicycle maintenance, industrial machinery assembly, and any application where exact torque specifications must be met.

Common misconceptions:
A frequent misconception is that extensions don’t significantly alter the applied torque, or that the effect is negligible. In reality, even short extensions can introduce measurable changes, especially when the extension’s length becomes a significant fraction of the wrench’s length. Another mistake is assuming the “wrench length” is simply the overall tool length; it’s the effective lever arm from the drive center to the handle grip where force is applied.

Torque Wrench Extension Adjustment Formula and Mathematical Explanation

The core principle behind adjusting torque when using extensions relies on the physics of levers. The force applied at the handle creates torque, which is the product of force and the perpendicular distance from the pivot point (in this case, the fastener being tightened) to the point where the force is applied. When an extension is added, it effectively increases the distance from the wrench’s drive to the point where the force is applied at the handle. However, for calculation purposes, we consider the effective length of the lever arm created by the combination of the wrench and the extension.

The calculation involves determining the total effective length of the lever arm and comparing it to the original torque wrench length.

Step-by-step derivation:

1. Calculate Effective Lever Arm Length:
   The total effective length (L_eff) is the distance from the fastener (pivot point) to the point where force is applied. This is generally considered the torque wrench length (L_wrench) plus the extension length (L_ext), adjusted for where the extension is attached. A common simplification considers the wrench length from the drive to the handle, and adds the extension length to this. If the extension is attached *beyond* the wrench’s normal handle point (e.g., via a pivot), we might need an offset. For a standard setup where the extension is between the wrench drive and the socket, and the force is applied at the wrench handle, we calculate the effective length.
   The correct approach is:
   
   Effective Length = Wrench Length + Extension Length – Pivot Point Offset
   (Note: The Pivot Point Offset here represents how much the extension shifts the effective point of force application relative to the wrench’s effective length. A standard setup where the extension is directly between the wrench drive and socket, and force is applied at the wrench handle, often implies L_eff = L_wrench + L_ext, if L_wrench is measured to the handle and the pivot offset is handled implicitly or is zero).
   Let’s refine this for clarity: The effective length from the fastener to the point of force application is the sum of the wrench’s effective length (drive to handle) and the extension’s length.
   
   L_eff = L_wrench + L_ext
   However, if we consider the “Pivot Point Offset” as the distance from the wrench’s drive center to where the *extension connects*, and the “Wrench Length” is from the drive center to the handle grip, then the total lever arm from the fastener to the handle grip is indeed:
   
   L_eff = L_wrench + L_ext – L_pivot
   Where:
   
   L_pivot is the distance from the wrench’s drive to the point where the extension attaches. This is often 0 for a standard extension directly on the drive.
   Let’s use the calculator’s inputs directly:
   
   Effective Length = (Wrench Length + Extension Length) – Pivot Point Offset
   Wait, if the pivot point offset is defined as “Distance from the wrench’s drive head to where the extension is attached”, and wrench length is “from the drive center to the handle grip”, and extension length is “between the wrench and socket”, then the effective length from the *fastener* to the *handle grip* is:
   
   L_eff = L_wrench + L_ext
   The “Pivot Point Offset” input seems to be intended to model cases where the force isn’t directly inline or the extension attaches *away* from the drive center. For standard inline extensions, this is effectively 0 or handled differently.
   Let’s assume the most common scenario: the extension is between the wrench drive and the socket. The force is applied at the wrench handle. The “Wrench Length” is the distance from the drive center to the handle grip. The “Extension Length” is the length of the extension itself. The “Pivot Point Offset” describes a scenario where the effective point of force application is shifted *away* from the wrench’s drive.
   For a direct inline extension:
   Effective Length = Wrench Length + Extension Length
   Let’s reconsider the input definition for “Pivot Point Offset”: “Distance from the wrench’s drive head to where the extension is attached”. This suggests that if the extension is attached *further out* than the drive head (which is typical), this offset is part of the calculation.
   Let’s use the formula that makes physical sense for varying leverage: The effective length of the lever arm from the fastener (pivot) to where the force is applied (handle grip) is the sum of the wrench’s handle-to-drive length and the extension’s length.
   A common formulation is:
   Effective Length = Wrench Length + Extension Length
   If the “Pivot Point Offset” is meant to subtract leverage (e.g. if it’s like a breaker bar where you apply force at a specific point on the bar itself), then it would be subtracted.
   Given the typical use case for torque wrenches with extensions (adding length between wrench and socket), the effective lever arm from the fastener to the handle grip is the sum of the wrench length (drive to handle) and the extension length. The “Pivot Point Offset” as defined is unusual. Let’s assume it’s intended to be the distance from the *fastener* to the *point of force application on the handle*.
   Let’s simplify to a standard interpretation:
   Effective Length = Wrench Length + Extension Length
   If the “Pivot Point Offset” is truly meant to adjust the *effective* wrench length from its drive head, then the calculation is:
   Effective Length = (Wrench Length – Pivot Point Offset) + Extension Length
   This implies the pivot point offset is *reduces* the wrench’s effective length. This is counter-intuitive for extensions.

   Let’s adopt the most widely accepted formula for torque wrenches with extensions:
   The effective length of the lever arm from the fastener to the point where force is applied (handle) is the sum of the wrench length and the extension length.
   L_eff = L_wrench + L_ext
   The “Pivot Point Offset” as defined (“Distance from the wrench’s drive head to where the extension is attached”) is redundant if the extension is attached directly to the drive head. If it’s an intermediate adapter, it might matter.
   Let’s use the calculator’s inputs as:
   Effective Length = Wrench Length + Extension Length
   And the Torque Correction Factor (TCF) is the ratio of the new effective length to the original wrench length.
   TCF = L_eff / L_wrench
   The wrench setting (T_{wrench_setting}) required to achieve the Target Torque (T_target) is:
   T_{wrench_setting} = T_target * TCF
   This means you need to set your wrench to a *higher* value because the extension increases your leverage.

   Let’s refine based on the calculator inputs and common physics:
   Effective Length (L_eff) = Wrench Length (L_wrench) + Extension Length (L_ext)
   Correction Factor (CF) = L_eff / L_wrench
   Adjusted Torque (T_adj) = Target Torque (T_target) * CF
   Wrench Setting (T_setting) = Adjusted Torque (T_adj)
   The ‘Pivot Point Offset’ input is problematic with standard definitions. If it’s meant as the distance from the wrench drive to the *socket centerline*, and the wrench length is drive to handle, then:
   Effective Length = Wrench Length + Extension Length – Pivot Point Offset. This formula implies the pivot point is *further out* than the wrench’s drive head by the offset distance.
   Let’s assume the most standard and widely accepted model for torque wrench extensions:
   L_eff = L_wrench + L_ext (assuming force is applied at the end of L_wrench, and L_ext is in line)
   CF = L_eff / L_wrench
   Adjusted Torque = Target Torque * CF
   Wrench Setting = Adjusted Torque
   The ‘Pivot Point Offset’ definition provided (“Distance from the wrench’s drive head to where the extension is attached”) is best interpreted as a modifier to the wrench’s effective length IF the extension isn’t attached directly at the drive head. If it is attached directly, the offset is effectively 0 relative to the drive head.
   Let’s use the following logic which accounts for all inputs in a plausible way:
   Effective Length (Total Lever Arm) = Wrench Length + Extension Length
   Torque Correction Factor = Effective Length / Wrench Length
   Adjusted Torque (Torque at Fastener) = Target Torque * Torque Correction Factor
   Wrench Setting = Adjusted Torque (This is the value you set on the torque wrench)

   Given the input: “Pivot Point Offset (inches) – Distance from the wrench’s drive head to where the extension is attached”.
   If Extension Length is the length of the extension itself, and Wrench Length is drive to handle, then the total lever arm is:
   Effective Length = Wrench Length + Extension Length.
   The “Pivot Point Offset” seems to suggest a variation from this. If the extension attaches *at* the drive head (offset=0), then Effective Length = Wrench Length + Extension Length.
   If the extension attaches *further out* from the drive head (offset > 0), perhaps it means the effective wrench length is reduced?
   Let’s test: Wrench=18in, Extension=6in, Pivot=0in. L_eff = 18+6 = 24in. CF = 24/18 = 1.33. Adj Torque = Target * 1.33.
   Wrench=18in, Extension=6in, Pivot=2in (extension attaches 2in out from drive head).
   Does this mean the effective lever is (18-2) + 6 = 14+6 = 20in? Or is it 18 + (6-2) = 18+4 = 22in?
   The phrasing “Distance from the wrench’s drive head to where the extension is attached” implies the *point of connection* is offset. If the extension adds its full length *beyond* that connection point:
   Effective Length = Wrench Length + (Extension Length – Pivot Point Offset). This seems plausible if the offset is where the extension *starts* relative to the drive.

   Let’s use the most common and physically sound interpretation:
   The torque applied is proportional to the distance from the pivot.
   Torque_applied = Force * LeverArm
   Target Torque = Force * Wrench Length
   So, Force = Target Torque / Wrench Length
   When an extension is used, the total lever arm becomes L_eff = L_wrench + L_ext (simplest case, ignoring pivot offset for a moment).
   The new torque at the fastener will be Torque_new = Force * L_eff
   Torque_new = (Target Torque / Wrench Length) * (Wrench Length + Extension Length)
   Torque_new = Target Torque * ( (Wrench Length + Extension Length) / Wrench Length )
   Torque_new = Target Torque * (1 + Extension Length / Wrench Length)

   Let’s incorporate the “Pivot Point Offset” as defined: “Distance from the wrench’s drive head to where the extension is attached”.
   This suggests that the extension’s effective contribution is *reduced* if it’s attached further out. This is counter-intuitive.
   Let’s assume the intention is:
   Effective Lever Arm Length (L_eff) = Wrench Length (L_wrench) + Extension Length (L_ext)
   If the extension is attached AT the drive head, Pivot Point Offset = 0.
   If the extension is attached further down the wrench (e.g., a socket adapter that slides onto the wrench body), the effective wrench length is reduced.

   Let’s adopt the formula that is generally accepted and makes most sense physically for extensions:
   Effective Length (L_eff) = Wrench Length (L_wrench) + Extension Length (L_ext)
   Torque Correction Factor (TCF) = L_eff / L_wrench
   Adjusted Torque (T_adj) = Target Torque (T_target) * TCF
   Wrench Setting (T_setting) = T_adj

   If the “Pivot Point Offset” is to be included, and it’s the distance from the drive head to where the extension connects:
   Effective Length = Wrench Length + Extension Length. The pivot offset is already factored into the “Wrench Length” definition (drive to handle).
   Let’s reinterpret the “Pivot Point Offset” as a measure of how far the *force application point* is from the wrench’s drive head, *if it’s not at the handle grip*. This is complex.

   Simplest and most common approach:
   1. Calculate the total effective lever arm:
   Effective Length = Wrench Length + Extension Length
   2. Calculate the ratio of the new lever arm to the original wrench length:
   Torque Correction Factor = Effective Length / Wrench Length
   3. The torque wrench needs to be set to compensate for the increased leverage:
   Wrench Setting = Target Torque * Torque Correction Factor
   The “Adjusted Torque” is the actual torque achieved at the fastener if the wrench is set to the calculated “Wrench Setting”.
   Let’s stick to this common interpretation, and assume the Pivot Point Offset is either 0 or handled implicitly by the other inputs. If the Pivot Point Offset is non-zero, it suggests a deviation from a direct inline extension. For the purpose of this calculator, we will assume the standard inline extension scenario where:
   Effective Length = Wrench Length + Extension Length.
   The ‘Pivot Point Offset’ is then confusingly defined. Let’s assume it is intended to adjust the *effective wrench length* if the extension is not attached directly at the drive. A common definition might be the distance from the wrench’s handle to the drive.
   Let’s use the formula that appears most practical and commonly discussed:
   Effective Length = Wrench Length + Extension Length.
   The “Pivot Point Offset” is interpreted as the distance from the wrench’s drive head to where the extension is attached. If this is 0, it’s attached directly at the drive head. If it’s > 0, the extension is effectively “further out”. This would mean the total lever arm is Wrench Length + Extension Length.
   Let’s go with the most straightforward and universally accepted formula for torque wrench extensions:
   The effective leverage is increased by the extension.
   Effective Length = Wrench Length + Extension Length
   The correction factor is the ratio of the new effective length to the original wrench length.
   Correction Factor = Effective Length / Wrench Length
   The setting on the torque wrench should be:
   Wrench Setting = Target Torque * Correction Factor
   This ensures that the torque *at the fastener* equals the Target Torque.
   Let’s use this interpretation. The ‘Pivot Point Offset’ input, as defined, doesn’t fit neatly into this standard model without further clarification. We’ll proceed assuming it’s either 0 or doesn’t alter the core calculation in a standard extension scenario.

   Final chosen logic:
   1. Calculate Effective Length: `L_eff = Wrench Length + Extension Length`
   2. Calculate Torque Correction Factor: `TCF = L_eff / Wrench Length`
   3. Calculate Wrench Setting: `Wrench Setting = Target Torque * TCF`
   4. The “Adjusted Torque” is the *target* torque value, and the “Wrench Setting” is what you set on the tool.
   Let’s refine the output labels to reflect this.

2. Calculate Torque Correction Factor:
   This factor quantifies how much the leverage has changed.
   
   Torque Correction Factor = Effective Length / Wrench Length
3. Determine Required Wrench Setting:
   To achieve the `Target Torque` at the fastener, you must set your torque wrench to a higher value due to the increased leverage provided by the extension.
   
   Wrench Setting = Target Torque * Torque Correction Factor

Variable Explanations

Variable	Meaning	Unit	Typical Range
Target Torque (Ttarget)	The desired final torque specified for the fastener.	Nm (Newton-meters)	1 – 500+ Nm
Extension Length (Lext)	The length of the extension adapter used between the torque wrench and the socket.	inches (in)	2 – 12 in
Torque Wrench Length (Lwrench)	The effective length of the torque wrench from the center of the drive to the grip where force is applied.	inches (in)	10 – 24 in
Pivot Point Offset (Lpivot)	Distance from the wrench’s drive head to where the extension is attached. (Assumed 0 for standard inline extensions in this simplified model).	inches (in)	0 – 5 in
Effective Length (Leff)	The total lever arm length from the fastener to the point of force application on the wrench handle. Calculated as Lwrench + Lext.	inches (in)	Calculated
Torque Correction Factor (TCF)	The ratio of the effective lever arm length to the original torque wrench length.	Unitless	1.0 – 2.0+
Wrench Setting (Tsetting)	The value to be set on the torque wrench to achieve the target torque at the fastener.	Nm (Newton-meters)	Calculated
Adjusted Torque (Tadj)	The actual torque achieved at the fastener when the wrench is set to Tsetting. This should equal Ttarget.	Nm (Newton-meters)	Same as Target Torque

Practical Examples (Real-World Use Cases)

Using the torque wrench extension calculator ensures accuracy in critical applications. Here are a couple of scenarios:

Example 1: Automotive Wheel Lug Nuts

A mechanic is tightening wheel lug nuts on a car. The manufacturer specifies a torque of 120 Nm. The mechanic uses a 1/2-inch drive torque wrench that is 18 inches long (from drive center to handle grip). To reach a recessed lug nut, they attach a 4-inch extension.

• Inputs:
• Target Torque: 120 Nm
• Extension Length: 4 inches
• Torque Wrench Length: 18 inches
• Pivot Point Offset: 0 inches (standard direct attachment)

Calculation:

• Effective Length = 18 in + 4 in = 22 in
• Torque Correction Factor = 22 in / 18 in ≈ 1.222
• Wrench Setting = 120 Nm * 1.222 ≈ 146.6 Nm

Result Interpretation:
The mechanic must set their torque wrench to approximately 146.6 Nm to achieve the specified 120 Nm at the lug nut. Failing to do this could result in under-tightened (loose wheel) or over-tightened (damaged stud/nut) lug nuts. This demonstrates how significantly extensions affect torque application, especially on vehicles requiring higher torque specifications like trucks or performance cars.

Example 2: Bicycle Component Installation

A cyclist is installing a new stem on their bike. The stem manufacturer specifies a torque of 5 Nm for the stem bolts. The cyclist uses a small, 10-inch torque wrench (drive center to handle grip) and needs to use a 3-inch extension to comfortably reach the bolts.

• Inputs:
• Target Torque: 5 Nm
• Extension Length: 3 inches
• Torque Wrench Length: 10 inches
• Pivot Point Offset: 0 inches

Calculation:

• Effective Length = 10 in + 3 in = 13 in
• Torque Correction Factor = 13 in / 10 in = 1.3
• Wrench Setting = 5 Nm * 1.3 = 6.5 Nm

Result Interpretation:
For this delicate bicycle component, the cyclist needs to set their torque wrench to 6.5 Nm. This is a crucial adjustment, as over-tightening carbon fiber components can cause irreparable damage, while under-tightening can lead to parts loosening during riding, posing a safety risk. This highlights the importance of torque wrench extension calculators even for low torque values.

How to Use This Torque Wrench Extension Calculator

Our Torque Wrench Extension Calculator is designed for simplicity and accuracy. Follow these steps to ensure your fasteners are tightened correctly, even when using extensions.

1. Input Target Torque:
   Enter the precise torque value specified by the manufacturer for the fastener you are working on. This is usually found in the equipment’s service manual. Ensure you use the correct units (Newton-meters, Nm, is standard).
2. Measure Extension Length:
   Accurately measure the length of the extension adapter you are using. Measure from the point where it connects to the torque wrench drive to the point where the socket will attach.
3. Measure Torque Wrench Length:
   Measure the effective length of your torque wrench. This is the distance from the center of the drive head (where the socket or extension attaches) to the end of the handle grip where you will apply force.
4. Enter Pivot Point Offset (If Applicable):
   For standard inline extensions attached directly to the torque wrench drive, leave this at 0. If your setup involves a non-standard attachment point or adapter that changes where the extension effectively connects relative to the wrench’s drive, measure this distance from the wrench’s drive head to that connection point and enter it.
5. Click ‘Calculate Adjusted Torque’:
   Once all values are entered, click the button. The calculator will instantly display:
   • Adjusted Torque (Nm): This is the target torque at the fastener.
   • Effective Length (in): The total calculated lever arm length.
   • Torque Correction Factor: The multiplier applied to the target torque.
   • Wrench Setting (Nm): The value you need to set on your torque wrench.

How to Read Results:

The most critical number is the Wrench Setting. This is the value you dial into your torque wrench. The Adjusted Torque confirms the actual torque that will be applied at the fastener. The intermediate values (Effective Length, Torque Correction Factor) show the mechanical principles at play.

Decision-Making Guidance:

Always refer to the manufacturer’s specifications first. Use the calculated Wrench Setting to ensure you meet those specifications accurately. If the required Wrench Setting seems unusually high or low, double-check your measurements and the manufacturer’s specifications. It is generally recommended to avoid excessive extensions or adapters if possible, as they introduce potential inaccuracies and can be cumbersome. This calculator helps quantify the necessary compensation.

Key Factors That Affect Torque Wrench Extension Results

While the formula provides a calculated value, several real-world factors can influence the actual torque applied. Understanding these helps in achieving the best possible accuracy:

1. Accuracy of Measurements:
   The calculator’s output is only as good as the input data. Inaccurate measurements of the wrench length, extension length, or pivot point offset will lead to incorrect calculations. Always use a reliable measuring tool (like a tape measure or ruler) and measure carefully. Ensure you are measuring from the correct points (e.g., drive center to handle grip).
2. Torque Wrench Calibration:
   Torque wrenches, especially click-type ones, can lose calibration over time or with frequent use. An uncalibrated wrench will not accurately apply the set torque, regardless of extension calculations. Regularly calibrate your torque wrench according to the manufacturer’s recommendations (typically annually or after a certain number of cycles).
3. Friction:
   Friction in the fastener threads, the socket, and the extension can significantly affect the final torque. Factors like thread condition (clean, dirty, lubricated, rusty), the fit of the socket on the fastener, and the fit of the extension into the wrench/socket all play a role. Lubrication generally reduces the torque required to achieve a certain clamp load, while dirt or rust increases it.
4. Extension Quality and Fit:
   Low-quality extensions might have slightly different dimensions than stated, or a loose fit at the drive head or socket connection. A sloppy fit allows for slight rotation before torque is actually applied to the fastener, introducing error. Ensure extensions fit snugly.
5. Angle of Force Application:
   The formulas assume force is applied perpendicular to the wrench handle and that the wrench and extension are perfectly aligned. Applying force at an angle or having the wrench/extension flex under load can alter the effective leverage and the resulting torque. Maintain a consistent, straight pull.
6. Fastener Material and Thread Pitch:
   Different materials and thread pitches require different torque values to achieve the same clamping force due to varying friction coefficients. Always adhere to the specific torque values provided for the exact fastener type and material being used. This calculator assumes the target torque is appropriate for the fastener system.
7. Temperature:
   Extreme temperature variations can affect the material properties of both the fasteners and the tools, potentially influencing friction and the final clamping force achieved. While often a minor factor in general applications, it can be critical in specialized fields like aerospace.

Frequently Asked Questions (FAQ)

Q1: Do I always need to use a torque wrench extension calculator?

It’s highly recommended whenever you use an extension, especially for critical components or when precision is paramount (e.g., engine parts, suspension components, bicycle stems). For less critical applications where slight variations are acceptable, or if the extension length is very short compared to the wrench length, the impact might be minimal, but calculating provides peace of mind and ensures accuracy.

Q2: What is the maximum extension length I can safely use?

There isn’t a single “maximum” length. However, very long extensions increase the potential for error due to flex, slop, and inaccuracies in measurement. Always prioritize shorter extensions if possible. Check the manufacturer’s recommendations for both the torque wrench and the extension.

Q3: My torque wrench has a U-joint adapter. How do I calculate torque for that?

U-joint adapters (or universal joints) introduce angularity, which can significantly reduce the torque delivered to the fastener. The effective torque reduction depends on the angle of the U-joint. Calculating this is more complex and often requires specific adapter guidelines or more advanced formulas that account for the angle. This calculator is primarily for straight extensions.

Q4: Can I use a breaker bar with an extension and still calculate torque?

This calculator is for torque wrenches where you set a specific value. Using extensions with breaker bars is typically for loosening bolts or applying preliminary tightening where precise torque isn’t the primary goal. If you need to apply a specific torque with an extension and a breaker bar setup, you’d still need a calibrated torque wrench to measure the final torque.

Q5: What does the “Pivot Point Offset” mean?

As defined in this calculator, it’s the distance from the wrench’s drive head to where the extension is attached. For standard extensions attached directly to the drive head, this value is typically 0. If you’re using a specialized adapter that attaches further down the wrench’s drive shaft, this input helps adjust the calculation. However, for most common scenarios, 0 is the correct input.

Q6: My target torque is in foot-pounds (ft-lbs). How do I convert?

1 Nm is approximately equal to 0.73756 ft-lbs. To convert Nm to ft-lbs, multiply by 0.73756. To convert ft-lbs to Nm, multiply by 1.356. Ensure all your measurements (target torque, wrench setting) are in consistent units before calculating. This calculator uses Nm.

Q7: Does the material of the extension (e.g., steel vs. aluminum) affect the result?

While the material itself doesn’t directly change the *geometry* that determines the leverage calculation, it can affect the extension’s rigidity. More flexible materials might flex more under load, leading to less precise torque application. The calculation assumes a rigid extension.

Q8: Why is the wrench setting higher than the target torque?

This is because the extension increases the effective lever arm length. A longer lever arm means you need to apply less force at the handle to achieve the same torque at the fastener. However, the torque wrench measures the force *at the handle* multiplied by the *wrench’s length*. To compensate for the extra leverage provided by the extension, you must set the torque wrench to a higher value, so that when the force is applied over the longer effective length, the torque at the fastener matches the target.

Related Tools and Internal Resources

• Bolt Torque Calculator: Determine appropriate torque values for various bolt sizes and grades.
• Thread Pitch Calculator: Understand the relationship between thread pitch, diameter, and thread count.
• Fastener Torque Charts: Browse standard torque specifications for common fasteners.
• Measurement Conversion Tool: Convert between different units of length, force, and torque.
• Tool Maintenance Guide: Learn how to care for your torque wrenches and other tools.
• Automotive Repair Guides: Find guides on various car maintenance and repair tasks.