The Ringside Pro Swivel is made of heavy duty stainless steel for the costant pounding of gym use. Super-fast industrial ball bearing action to increase speed, hone hand-to-eye coordination and build stanima. The chain-link security provides extended protection and helps prevent speed bag theft. Features: Rapid ball bearing action for speed and lightning fast rebounding Stainless steel will never rust or chip like chrome plated models Mounting screws included Additional Details: