1This is a plastic nylon mount and demount head used on many tire changer machines 2Using plastic mount head is much safer for delicate and expensive wheels and it is durable enough to withstand the stress of larger tires and wheels 3It prevents wheels from scratching and damaging when clamping wheels from inside clamps 4With precision steel casting and smooth surface to reduce friction, it is very easy to use 5It can be used for many times with stable characteristics and high performance Features: This is a plastic nylon mount and demount head used on many tire changer machines. Using plastic mount head is much safer for delicate and expensive wheels and it is durable enough to withstand the stress of larger tires and wheels. It prevents wheels from scratching and damaging when clamping wheels from inside clamps. With precision steel casting andsmooth surface to reduce friction, it is very easy to use. It can be used for many times with stable characteristics and high performance. Specifications: Material: Nylon & Steel Color: Black Length: 20cm/7.8" Installing Hole Diameter: 28mm/1.1", 30mm/1.18" (optional) Package Weight: Approx. 504-575g Package Included: 1 x Tire Changer Nylon Mount/Demount Head Notes: 1. Please check our photos with measurements to make sure it fits your machines. 2. It is easy to install, but professional installation is highly recommended.