These diamond plated laps and diamond magentic backing disk are manufactured exclusively for Glassworks right here by Hans Superabrasive for Grinding, Shaping and Polishing. More diamonds means more than just fastergrinding.Metal Bond Diamond Discs, have diamond particles held firmly in place on a rigid backing. The diamond particles are electroplated for maximum bond strength and heat dissipation. A hard nickel alloy is used to rigidly bond a layer of sharp, blocky diamond to a steel plate. The sharp diamond particles cut cleanly with no edge rounding. These Metal Bond Diamond Grinding Discs radically reduce the time required for material lapping and grinding. Metal bond diamond grinding discs are available with either magnetic or PSA backing.