The Rotary Torque Sensor is the ideal torque-auditing tool for testing the actual torque being applied on the assembly application. By connecting a rotary torque sensor between an electric or pneumatic tool and assembly application, you can monitor the torque being applied from the tool to fastener or bolt. Accuracy .25% of full scale and Bi-directional.Model:RTSX400FRange: 54.2 - 542.4 N.m,40 - 400 lbf.ft, 5.5 - 55.2 kgf.m.Input Drive:3/4 F/SqOutput Drive:3/4 M/SqTool Length:3.8Tool Width:2.3Tool Height:2