This precision torque screwdriver is made to hold its calibration in even the most extreme environments. It features a positive locking pull down adjustment knob with an automatic lock in counterclockwise direction. Trilobular comfort grip allows you to deliver maximum torque with minimum effort. Universal 1/4" hex bit holder with strong rare earth magnet to securely hold the bit. Cam torque limiting clutch guards against over torque. The easy to read window scale is accurate to +/- 6% clockwise direction and from 20-100% of full scale. Individually serialized, and comes with matching certificate of calibration traceable to N.I.S.T.
Product specifications: Torque Range: 5 - 40 in-lb in .5 in-lb increments. 2 lbs (0.5Kg) shipping weight.