Proper storage: To maintain calibration, store micrometer-style wrenches at their lowest setting. Tekton's 24320 should be stored at 20 in.-lb.
1/4, 3/8, 1/2 Inch Drive Micrometer Torque Wrench Set with Cases (3-Piece)
Set Includes:
- 1/4 inch drive (20 - 200 in-lb) — Product Manual
- 3/8 inch drive (10 - 80 ft-lb) — Product Manual
- 1/2 inch drive (25 - 250 ft-lb) — Product Manual
Micrometer Torque Wrenches do not include a certificate of calibration. If one is required for your application, shop Split Beam Torque Wrenches.
Details
±4% Accuracy
Calibrated according to the ASME B107.300-2010 standard, each wrench is evaluated at three set points along its full range—20%, 60%, and 100%—with three test measurements at each set point.
Example at 100 in.-lb.

Maximum Expected Error
Example at 100 in.-lb.
![]() Torque Setting |
![]() Maximum Expected Error |
Micrometer Design and Operation

Clockwise Measurement
Drives in both directions and measures torque in the clockwise direction
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Dual-Range Scale
High-contrast, easy-to-read scale is marked with in.-lb. and Nm units
Locking Nut
Locks the torque setting in place while you are using the wrench

±4% Accuracy
Calibrated according to the ASME B107.300-2010 standard, each wrench is evaluated at three set points along its full range—20%, 60%, and 100%—with three test measurements at each set point.
Example at 50 ft.-lb.

Maximum Expected Error
Example at 50 ft.-lb.
![]() Torque Setting |
![]() Maximum Expected Error |
Micrometer Design and Operation

![]() |
See How it Works 0:40 |
Proper storage: To maintain calibration, store micrometer-style wrenches at their lowest setting. Tekton's 24330 should be stored at 10 ft.-lb.
Clockwise Measurement
Drives in both directions and measures torque in the clockwise direction


Dual-Range Scale
High-contrast, easy-to-read scale is marked with ft.-lb. and Nm units
Locking Nut
Locks the torque setting in place while you are using the wrench

±4% Accuracy
Calibrated according to the ASME B107.300-2010 standard, each wrench is evaluated at three set points along its full range—20%, 60%, and 100%—with three test measurements at each set point.
Example at 200 ft.-lb.

Maximum Expected Error
Example at 200 ft.-lb.
![]() Torque Setting |
![]() Maximum Expected Error |
Micrometer Design and Operation

Proper storage: To maintain calibration, store micrometer-style wrenches at their lowest setting. Tekton's 24340 should be stored at 25 ft.-lb.
Clockwise Measurement
Drives in both directions and measures torque in the clockwise direction


Dual-Range Scale
High-contrast, easy-to-read scale is marked with ft.-lb. and Nm units
Locking Nut
Locks the torque setting in place while you are using the wrench

Specs
1/4, 3/8, 1/2 Inch Drive Micrometer Torque Wrench Set with Cases (3-Piece)
Drive Size | 1/4 in. |
Scale Increment | |
Accuracy | |
Measuring Direction | |
Country of Origin | Taiwan |
Item Weight | 8.55 lb. |