The multi-patented Cyclone Thru-Hole Power System from Kluhsman Racing Components is a three-in-one power ratchet. This system has a thru-hole 1/2-inch maximum diameter and 3/8-inch power ratchet, and a 1/2-inch power ratchet with 90 foot-pounds of torque. The Cyclone features double back-loaded pawls to eliminate slippage and friction. It's designed to fit in the shallowest drawer in your toolbox.