Features:_x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_1. Rougher surface which are quicker than the larger grit burrs when Sanding, Polishing and Engraving._x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_2. Various shapes available. Rich in quantity and various shapes meet your many needs. Great gift for DIY Enthusiasts._x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_3. The drill bit is made of quality Brazing material, which is sturdy and durable with high strength, making polishing and carving easier._x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_4. It can be used for glass, ceramic tiles, granite, quartz stone, marble and many other materials._x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_5. Note: Be sure to add water to cool the grinding head during the engraving operation to prevent it from being burned and scrapped at high temperature. It cannot be used as an impact function._x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_Notice:_x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_Actual color may be slightly different from the image due to different monitor and light effect._x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_Please allow 1-3cm deviation due to manual measurement._x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_:_x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_Material: Brazing_x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_Size: As the picture shown_x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_ColorStyle: As the picture shownPackage List:_x005F_x005F_x005F_x005F_x005F_x005F_x005F_x000D_1 x Bit