INCART Universal Steel (4pcs) Car Tire Valve Stem Air Caps Cover + (1pcs) Keychain for Honda Black Universal Black Car Tire Valve Stem Air Caps + Keychain for Honda Material: Stainless steel alloy material Waterproof design: Car Tire Valves Caps Built-in Waterproof Ring Keychain design: Not only as keychain, it can be used as Wrench! Easy to install and remove by Keychain, Only caps onto tire valve stem,then screw.