This tire clamps for tire machine is for use with make of mounting and demounting tires, made high grade nylon and plastic composite material. This Tire Changer can be used when replacing various types of tires. Especially when incorporating a flat tire. If you put it in the rim part of the wheel, could form a tire smoothly. Plunger on this tool is spring loaded, It will stay in place and prevent tire rebound when installing and removing tires. Built-in spring, comfortable touching, easy to use.It will stay in place and prevent tire rebound when installing and removing tires. 2 Pack Tire Changer Bead Clamp