20 Pcs Diamond Grinding Bits 4Mm Cylinder Head Grinding Bit Rotary Diamond Burr Set For Most Rotary Tool Bit Grinder

SIZE:5*5*1cm Size: Head diameter: 4mm / 0.15inch; Shank diameter: 3mm / 0.11inch; Length: 45mm / 1.77inchCylindrical tip, diamond-coated heads that can be mounted on electronic grinders, gantry grinders and hand drills.Used for engraving, trimming, precision grinding and internal grinding of carbides in ceramics, glass, precious stones, alloys and many other abrasive materials.Excellent for carving, engraving, forming, drilling and Smoothing the .Diamond coated drill bits are suitable for glass, tile, stone and hardened metals. Colour: SilverMaterial: Diamond Package Contents:20 x Diamond Grinding Bit Only the above package content, other products are not included.Note: Light 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.