• Package Contains：A set of 60 includes 3 different sizes, 1mm (1/25) × 20pcs, 2mm (1/16) × 20pcs and 3mm (1/8) × 20pcs, all with standard 1/8" shanks to meet your various creative needs
• High-Quality Material：Made of high quality diamond particles, high hardness, wear resistant and impact resistant
• The Perfect Tool：These diamond-coated drills are the most important tool in jewelry making.Great for drilling holes in sea glass,shells,gemstones and more.Ideal for glass drilling,jewelry making and lapis lazuli projects
• Superior Performance：Diamond tipped drill bits suitable for hand drills, soft shank drills and sharpeners. Whether you're working on jewelry, lapis lazuli projects or glass crafts, these diamond-tipped drill bits offer superior performance
• How to Use：Step 1 - start drilling at a certain angle; Step 2 - hold the drill bit in your hand and move it carefully so that it can just ream out both sides of the hole(remember not to use too much force); Step 3 - cool with water