Detailed Product Description Keychain-Mini Auto Part, Piston Keychains, Piston Keyring, Piston KeyholderMetal Piston Keychain with Working Die-cast Chrome piston keyholderAssembly Including Rod, Wrist Pin and Rings. It is articulating piston head on a realistic connection rod.So the piston actually moves.Auto related thing, mini auto car accessory keyring.Size measures Approx: 70.5mm X 16MM Large ...