DIGITAL TORQUE TESTER, 195~1946in.lb IST-TT220 Product Description 16.2~162.2ft.lb. Accuracy ±1% (CW and CCW). Res. 1in.lb/0.1ft.lb. Square socket 1/2". With external sensor, to test torque wrenches, torque screwdrivers and other torque tools. Clock and counter-clockwise operation. Peak and track working modes.