The HIOS CLF-Series is designed for robotic and automated applications. The durable robotic screwdrivers deliver reliability and precision torque. Ensures accuracy in fastening with precision automatic shut-off clutch once preset torque is achieved. Requires a Transformer (power supply).Model:CLF4000XHDrive Size:1/4" F/HexRange: 10 - 35 cN.m ,0.9 - 3 lbf.in, 1 - 3.5 kgf.cm.Tool Weight:15.2 oz.Tool Length:7.75RPM High:1000RPM Low:560Grip Dia:1 1/4"