1.ASA electric tools digital display control torque tester 2.Auto zero set 3.Torque setting 4 ... power supply , electric power tool , electric tool , screw driver , power tool , screwdrivers , screw driver , electrice power tool , tools , screw drivers , tool , electric toolsFeature:Digital Display ... direction can be tested.There is need to change screw driver head. 3. The torque sensor is attached, ...