Drilax&trade; 50 Pcs Professional Quality High Density Diamond Drill Bit Burr Set Grit 120 50pc -Seaglass Rocks Ceramics Tile Glass Porcelain Jewelry Making Lapidary Engraving for Rotary Tools 1/8 Inch Universal Shank - Plastic Storage Case 50 Pc High Density Electroplated Diamond Coated Grit 120 Drill and Burr Set of 50 pcs Assorted Shapes and Sizes with 1/8" Shank - use with motor tools, drills, high speed grinders Universal fit - compatible with Dremel (R) brand tools. These burrs and not Dremel (R) brand. Good for drilling - grinding - shaping - carving and engraving