Product Information: Features: Durable, reliable quality. Suitable for grinding glass, tiles, marble, jewelry or rock on the edge. For the grinding of the mold, the hole of the grinding, seiko fine to do reliable quality. Can also use in the chamfering and grooving of various mechanical parts, cleaning pipes, finishing surfaces of machined parts. Diamond grinding head made of high-grade diamond-plated diamond, is processing all kinds of mold, carbide, glass equipment, jade carving and other ideal correction tools. Specification: Condiiton: 100% Brand New Bonding agent: Plated diamond Production process: Plating Style: Big head / Small head (Optional) Handle: 1/8 "(3.175mm) Weight: 0.28KG Package Included: 50 x Diamond Coated Grinder Head The delivery time is around 10-20 working days after your purchase