Surface conditioning discs have an open construction, scrim reinforcement and a superior resin system. These features minimize loading, heat build-up, fraying of disc edges, grain shedding and extend disc life, providing superior performance. Have an open construction, scrim reinforcement and a superior resin system. Plastic button-style discs. These features minimize loading, heat build-up, fraying of disc edges, grain shedding and extend disc life, providing superior performance.