The CL-Series electric torque screwdriver by HIOS is designed for heavy-duty production and delivers reliability as well as precision torque. The full auto shut-off clutch on this electric screwdriver completely stops the bit from turning once the torque setting is reached. This feature protects the fastener from being damaged by the electric screwdriver’s bit. The HIOS electric screwdriver is a smart choice for operations requiring a wide range of torque values. Common usages for this electric screwdriver include demanding assembly-fastening applications that require torque control, screw counting functionality and ESD protection. Requires a Transformer (power supply) like STC30 Plus, CLT-60 or CLT-70STC3.This CL-7000 model has 25:1 gear ratio that allows increased torque output at lower RPMs.Model:CL7000Drive Size:1/4" F/HexRange: 30 - 271 cN.m,2.6 - 24 lbf.in, 3 - 27 kgf.cm.Tool Weight:26.5 oz.Tool Length:10RPM High:550RPM Low:500Grip Dia:1 1/2"