... disc for precise, uniform, close-tolerance finish. High-strength polyester film backing resin-bonded for durability. For metal, plastic, paint spot repair ... , automotive power train components, crank ,cam shaft ,magnetic head& disc / roll /belt ... value General purpose ApplicationAOEM Finish Prep/Repair, Orbital SandingAttachment TypeHookit™/PSABacking MaterialPolyester FilmBacking ...