Electroplated diamond has the characteristics of high hardness and good wear resistance. The chamfered round handle is made of hard iron, which can withstand a certain amount of pressure and tension, has high stability and is not easily deformed. Easy to use, used with electric grinders, electric drills and other power tools. Specially used for shaping and grinding spherical beads, it can produce clean, accurate and complete spherical beads in a few minutes. The chamfered round handle makes the clamping more convenient and firm, and the working process is more stable. Suitable for gem and jade carving, casting cleaning, rust removal and polishing, inner hole grinding, and a good grinding tool for DIY enthusiasts. In addition, it is also suitable for engraving, grinding, trimming, and fine grinding of jade, amber, stone, beeswax, glass, etc. When installing a tool, tap it gently with a wrench or adjust the chuck until the tool remains stable; when drilling, control the force and keep it stable to avoid shaking or excessive force to damage the tool; after use, be sure to add water to cool it to avoid diamond ink. Shank diameter: 3mm / 0.12Inch Total length: 45mm/1.77Inch Shape: Cylindrical Specification:A:4/5/6/8/10/12mm Colour:As Shown Material:Metal Package Contents: 1set * Diamond Grinding Burrs Drill Bit 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.