The micro-adjustable torque screwdriver is an exellent tool for flexible production. This driver allows instant changes to the torque value with the easy-to-read window scale and a precise pull-to-set, push-to-lock adjustment knob. Adjusting the screwdriver is simple. Just pull the adjusting knob to unlock, then turn it to the desired torque while keeping an eye on the major window scale and the minor knob scale. When the correct setting is reached push in the knob until it clicks. And it's ready to use! Stainless steel 1/4" Hex receiver for all standard drive bits. Easy-to-read window scale and an adjustment knob for precise settings. Non-magnetic spring-loaded bit holder. Cam-over torque limiting clutch. Lightweight yet rugged construction. Comfortable shape and non-slip grip. Permanently lubricated internal mechanism. Three models available covering a torque range of 20 in. ozs. to 40 in. lbs. with an accuracy of +/- 6%.