Low input torque (160-190 ft/lb) can easily be applied by one person using standard 1/2" drive tools. Shearable output drive square is replaceable and the square drive will shear at 3-10% overload torque to protect against expensive internal damage. Built in anti-backlash device / torque holding ratchet maintains the multiplier's input torque allowing the use of ratcheting drive tools. The planetary gear system provides torque accuracy of +/-5%