[ Materials] burr set made of particle with reliable quality, thick and , wear resistance, high hardness and impact resistance, sturdy enough for fine detail work. [Universal Compatiblity] grinder bits set is featured with universal 3mm (1/8 inches) shank grinding drill bits, which compatible with most rotary tools or die grinders. [ Grinding Head Burr] Mounted Point used for sculpturing, dressing, grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many other abrasive materials. [Multi-functional] 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 dogs' nails) etc. [Universal Shank]Rotary tool burrs set,Shank Diameter:0.118inch (3mm); Head Diameter: 0.31inch (8mm)., Weight: 0.14991433816 pounds, Manufacturer: NONDK