Volkswagen Piston Keyring

The Piston has the ability to pivot on an included track rod, while the opposite end of this track rod presents a hoop that you attach your keys to or use it to hang this keyring from a hook or other loop for decorative purposes. The piston is a part of all combustion engines. It's an actual moving part that transfers the force from the expanding gas in your car's cylinder to the crankshaft. It may also act as a valve in some engines. Either way, it's a vital part of any engine and is necessary for... More