3.The diamond carving bits are made of high-grade stainless steel shank, high strength.
4.The diamond FG high speed burs are made of premium diamond particles and metal, durable and sharp cutting.
5.Suitable for field stone,ceramics,glass,carbide,tile,marble,jewlry,rock etc. Highly recommended for crafts, hobbies, home repair, jewelry,lapidary use, modeling, and so much more.