Tap wrench compact structure, small size, light weight, large output torque, is a powerful tool for disassembly nut and bolt preload. Torque control in this 3% range, can meet the requirements of high-precision coupling tightening torque values. Tap wrench torque is the product of force and distance, when the fastening screws bolts nuts and other threaded fasteners need to control the size of the torque applied to ensure screwing torque is too large and not because of the damage to the threads. . Http://www.hbbtglj.com/tzbs/