With this Armstrong 2000 ft/lb Reaction Bar Torque Multiplier, low input torque is required and can be applied easily by one person. Internal planetary gear system provides strength and durability. The torque multiplier with an impact socket on the output square is placed on the fastener to be turned with the reaction bar restrained against some substantial part of the equipment being serviced. Input and output rotation directions are the same. Torque reaction on the reaction arm is in the opposite direction from the input/output force. Accurate +/- 5% CW from 20% to 100% of wrench capability.