SpecificationProduct Name: Diamond Coated Grinding BitMaterial: Carbon SteelHead Diameter: 10.5mm/0.42 inchHead Length: 21mm/0.83 inchShank Diameter: 6mm/0.24 inchTotal Length: 60mm/2.4 inch Package Content: 2 pcs 60 grit diamond grinder bitDescriptionFeatures: 60 grit grinder head, high strength, and good coaxiality.Made of carbon steel and the grinding head coated with diamond, brazing treated, with higher abrasion-resistant, durable use.This grinding drill bit is suitable for quickly cutting, drilling holes, engraving, finishing, grinding, carving, and repairing.Good grinding tool for processing ceramic, glass, wood, marble, stone, Concrete, and other non-metallic materials.The 6mm (1/4 Inch) shank bit fits most of the electronic grinder, engraving machines, hanging mill, and hand electric drill.TipsFlying chips may be generated during use. Please use jigs, non-slip finger covers, and wear protective glasses when using them.