... , diamond coated for grinding, engraving, carving on metal, wood, bone, jade, PVC, glass, stone Catalog:Description:1. Most modern galvanisation process ... grinding and engraving on metal, wood, bone, jade, PVC, glass and stone carving, can be used as glass drill bit, diamond ... , sintered diamonds, diamond disc, polishing brushes and mounted stone etc.Welcome to download our catalog from our website: www ...