1/2 in Drive Torque Multiplier, 1100 ft-lb, 3:1 Ratio

A 3:1 geared torque multiplier with a 1/2-inch square input and a 3/4-inch square output. Put up to 365 ft-lb in with a 1/2-inch torque wrench or breaker bar and the head puts up to 1100 ft-lb out at the socket. The gear head is chrome-molybdenum steel and the reaction bar is chrome-vanadium.

It is built for the fasteners a normal breaker bar will not move safely: rusted axle and hub nuts, large lug nuts on 3/4-ton and 1-ton trucks, trailer hubs, and heavy suspension hardware that comes up on driveline jobs. Because the multiplier does the work, you are not standing on a cheater pipe that can slip off and put you into the fender.

On the bench or under the truck: fit a 3/4-inch drive socket to the output, set the reaction bar against a solid stop such as a neighboring lug, the frame, or a suspension member, then turn the input with your 1/2-inch wrench. Output is roughly three times what you put in, so a torque wrench on the input gives you controlled final torque. Hand tools only on the input - no impact or air tools.

Comes in a blow-molded case with the reaction bar. Sockets and the input wrench are not included.