The Atlas® Quick Change Head Assembly is designed for the tire service center that works on both factory steel wheels and alloy custom rims. All Atlas® tire changers come standard with a metal mount/demount head. These metal heads have two plastic inserts that help to protect the wheels from contact with the metal head. However, many customers feel more confident using a COMPLETE PLASTIC M/D HEAD when changing after market alloy wheels. The Atlas® Quick Change Head Assembly fits most 200 Series Atlas® wheel clamp tire changers.