SK Hand Tool75150 1/2-Inch Drive Micrometer Adjustable Torque Wrench, 20-150-Feet Pound Simple locking collar locks handle to avoid changing torque value while in use SK Micrometer Torque Wrenches provide the ideal tools for automotive and transportation technicians Accuracy of +/- 3% Indicated Value (from 20% to 100% of capacity) meets or exceeds ASME B107.14M and ISO 6789