This shaft is designed to be used with the Unisteer rack and pinion kits and aftermarket columns. It is for 3/4"-DD columns. The kit includes two shafts: one 8" inches long and one 12" inches long, a universal joint 16 mm DD x 3/4" DD and one 9/16"- 30 spline x 3/4" DD, a coupler, drill bit, and pins.