Diamond Soft Pads/smoothing Discs ensure rapid removal of grinding marks and high spots on gemstones. The key to the fast smoothing action of the discs is diamond resin bonded to a flexible surface. Diamond Smoothing pads are guaranteed to out-perform silicon carbide discs and diamond compound finishing systems. All discs come with a pressure sensitive adhesive backing. They will adhere to most lags or backing plates. Use on a Soft Rubber Backer to achieve evenly Polished Cabochons.