SK 74151 1/2-Inch Drive 20 Foot Pound to 150 Foot Pound Micrometer Torque Wrench Micrometer torque wrench with exact torque settings Accuracy 20% to 100% of scale to the right (+/-4% of reading) and to the left (+/-6% of reading) Reversible heat ratchet for use of left or right-threaded fasteners Positive locking mechanism secures readings Full lifetime warranty