The Mountz 020341 TSC90 Adjustable Cam-Over Wrench, 1/4" Sq. Dr., 20-90 lbf.in, Gedore # 059080 is a precision production tool designed to apply a set amount of torque. When the set torque is reached the unique cam action prevents over-torquing. This Torque Wrench was designed and manufactured to meet or exceed the accuracy and repeatability requirements of ISO 6789.2003 (+/- 6% of setting).