Usage Tips: [Diamond Grinding Head Burr]Diamond Mounted Point used for sculpturing, dressing, precision grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many other abrasive materials. [Diamond Materials]Diamond burr set made of diamond particle with reliable quality, thick and durable, wear resistance, high hardness and impact resistance, sturdy enough for fine detail work. [Universal Compatiblity] Diamond grinder bits set is featured with universal 3mm (1/8 inches) grinding drill bits, which compatible with most tools or die grinders. [Multi-functional]Diamond grinding burr bits, extremely sturdy and wear resistance. Great for polishing stone, glass, ceramics, tile, brick,fiberglass, rock. DIY craft, craft modeling, home repair (wood, some plastic and ' nails) etc. [Universal ] tool diamond burrs set, Diameter:0.118inch (3mm); Head Diameter: 0.15inch 0.19inch 0.23inch 0.31inch 0.39inch 0.47inch (4mm 5mm 6mm 8mm 10mm 12mm). colour: silver Material: Diamond Package Contents: 1 set x carbide burr set (12pcs) 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.