ONLY COMPATIBLE with Y100 Rugged Warrior Power Rack & Y120 Rugged Maverick Half Rack UPGRADE YOUR Y100/Y120: The Rugged Fitness Weight Horn provides bumper and olympic weight plate storage options to both the Rugged Power Rack and Half Rack. Designed with a pull-pin for easier adjustments than competitive bolt-based weight horns. The Rugged Fitness Weight Horn provides bumper and olympic weight plate storage options to both the Rugged Power Rack and Half Rack. Designed with a pull-pin for easier adjustments than competitive bolt-based weight horns.