ITEM NAME:30 pcs Diamond Burr Bits Drill Kit For Engraving Carving Rotary Tool Set Hot Descriptio n Description: Features : 100% brand new and high quality Diamond coated bur set with 2.3mm shanks 30 pcs assortment of various shapes and sizes Bits come in different sizes and coarseness to satisfy any technology. Fit most professional electric drills, best for replace nail drill bits Can be used to various applications including carving, grinding and etching on a variety materials. Specifications: Specification: Burs Length: About 1.77 inch/ 45mm Bur Shank Diameter: About 0.09 inch/ 2.3mm Package Included: Package Included : 30 Pcs Diamond Burr Bits Whatever the ending's perfect or not, you can't disappear from my world 30 pcs Diamond Burr Bits Drill Kit For Engraving Carving Rotary Tool Set Hot.Diamond coated bur set with 2.3mm shanks. 30 Pcs Diamond Burr Bits. Can be used to various applications including carving, grinding and etching on a variety materials. Fit most professional electric drills, best for replace nail drill bits.