The Cummins Diesel Engines Nickel Plated Engraved Piston Keychain Key Chain Holder is a sleek and stylish accessory for enthusiasts of semi-trucks. Made of metal and featuring a glossy silver finish, this keychain is adorned with an engraved Piston design, making it a unique and eye-catching piece. It is a clip-on keychain with the Cummins brand displayed, ideal for collectors and fans of automotive parts and accessories.