Required when servicing many late model engines that use torque-to-yield fasteners. This Torque Angle Meter from OTC Measures angle of rotation after pre-torque in torque-angle applications. Using a unique piezo gyro technology makes angle to torque measurments easy and quick without error. The angle meter clips onto standard 1/2” socket extension or similar drive tool. Measure Angle 0-199°. 1% CW accuracy. A simple arrow key operation to set desired angle, beep and flash feedback for ease of use. Battery power provides 12 hours of continous use (CR 2035) and even has a auto power off feature to preserve battery life.