30pc Diamond Burr Set Rotary Tools Type: Drill Bits Features: 30pc Set, Shank Size: 1/8, Grit: 400, Comes In Sturdy Compact Case, Ideal for Medium Material Removal by Carving, Etching, Grinding, Sanding, etc., Great for Working w/ Ceramics, Stone, Glass, Tile, Wood, Fiberglass, All Natural Materials & More!