Detailed Information: The product is made of zinc alloy,heat resisting,rust-proof and durable.Protect and decorate your car. Thread machining inner core,protect the valve caps better. How to use: Built-in rubber ring,to prevent Air leakage. Imported resin material,make the color bright and lasting(No softening,no marks,durable) The Wrench key chain specially design for the tire valve caps,it’s easy for buyer to unscrew it. It’s best to wipe up the valve core,keep it dry and without water,oil or dust.