Checkline GLK [GLK250E] Digital Torque Screwdriver, 0.22 - 22.13 Lbf-in / 3.5 - 354.0 Ozf-in / 2.5 - 250.0 N-cm Capacity. GLK Digital Torque Screwdrivers are compact, lightweight, and feature, LED and audible alarms, ergonomic handle, push button controls, and are battery powered. Measure torque in peak or real time modes. Auto zero mode resets peak measurements automatically (1~10 seconds). Selectable units of ozf-in, lbf-in, and N-cm. Five programmable torque presets stored in memory enable the user to check frequently used values. The presets alert the user with an intermittent signal at 90% and a continuous signal at 100% of the preset torque value using LED and audible indicators which enable users to tighten to within 10% of a preset torque value. Pass/Fail mode counts the number of fasteners tightened within programmed high and low torque limits.