Xii:Xi Fitness Barbell J Cups American Made Power Cage/Power Rack J Hooks For A Squat Rack (Fits 3X3 Rack) (5/8 Pin)Our sandwich style J Hooks are an excellent addition to your home or commercial gym. Made from American Steel with beautiful 1 thick custom machined UHMW Plastic, the craftsmanship is unmatched. The UHMW Plastic protects your barbell..