We are offering the high quality Disc brake liner for use in various types of cranes. A disc brake is a type of brake that uses the calipers to squeeze pairs of pads against a disc or "rotor" to create friction. This action slows the rotation of a shaft, such as a vehicle axle, either to reduce its rotational speed or to hold it stationary. The energy of motion is converted into waste heat which must be dispersed. The offered Disc Brake Liner is very effective and made for use in various industries. They are very durable.