The X-3 Series Stabilizer Bar by Titan Fitness® can mount to the top or bottom of your X-3 Series Bolt-Down Power Rack. Constructed from heavy-duty 3 x 3-inch 11-gauge square steel with 2-inch hole spacing spanning the length of the 42-inch Stabilizer Bar. The crossmember connector strengthens the stability of your Power Rack and will eliminate the walk-through design if bolted to the bottom. Additionally, this durable stabilizer can be utilized as a Daisy Chain to link multiple X-3 Series Power Racks with different depths in a gym training facility setting for better space efficiency.