The TITAN Series Crossmember Stabilizer mounts to the top back of your 90" or 100" Power Rack, built from heavy-duty 3" x 3" 11-gauge steel with 2" hole spacing across a 42" bar. It improves rack strength and stability and lets you add new stations — including the Lat Tower, Pull-Up Spheres, shackles, and more — to build out a busy training floor.