60 Grit Diamond rotary tool bits is made of high-quality Material,rough , uniform sand, thick and , wear-, high hardness, impact resistance 3mm (1/8 inch ) handle diamond burr bit, suitable for most stained glass supplies tools and die grinders, High compatibility, easy to replace. Grinder tool ,our stone abrasives include 10 different abrasives, each with two identical particle sizes and shapes. Various shapes, including spheres, cones, cylinders, round head cylinders, , etc., different shapes and sizes to meet a variety of applications. Suitable for jewelers, gemstones, DIY carving hobby, stone carving, craft modeling, home repair. Polishing and carving, precision sanding, glass grinder, metal, hardwood, marble, , stone, ceramics, gemstones, , etc. It is very suitable for the molding of bonsai trees in the dead wood area, the fine repair of hard stone, carving, etc You receive a 20-piece diamond grinding drill bit in a plastic package that is drop-proof, moisture-proof, easy to carry and easy to store. If there are any quality issues, please to contact us and we provide a refund or replacement to your complete satisfaction. Thank you for your support! Colour:As Shown Material:Metal Package Contents: 1 set * rotary tool kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.