Specification Brand : Driak BulletPoint1 : 10pc Diamond Cutting Grinding Head Jade Stone Carving Polishing for Dremel Rotary BulletPoint2 : Grinding Drill Bits shape : Cylindrical.Material : Alloy ,diamond ;Shank Diameter(Each) : 3mm / 0.12"Each Length : 45mm / 1.77";Tip Diameter : 8mm/ 0.3".Package Content :10 Pcs x Grinding Drill Bit BulletPoint3 : Used for sculpturing, dressing, precision grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many other abrasive materials.Cylindrical tip, diamond coated head. Can be installed on the electronic grinder, hanging mill and hand electric drill (not included here). BulletPoint4 : Its surface can be cleaned and restored to regain its original shape by using a dressing stone. Nail drill bits used for cleaning, sharpening, deburring, grinding, rust protection, etc.Metal grinding bits Ideal tools for processing various molds, carbide, glass, jade carving and others. BulletPoint5 : Diamond grinding wheel suitable for metal, casting, welded joint, rivet, etc. Can be installed in the electric machine, engraving machine,hanging machine, pneumatic engraving pen.Diamond drill bit for jade grinding, mold repairing, glass carving, cast cleaning, burr welding and so on. Color : Silver CompatibleMaterial : Ceramic,alloy,glass,metal,stone IncludedComponents : 12 pieces 3/32'' shank 45 degree bearing cutter hart burr ItemName : 10pc 3mm Shank 8mm Head Cylinder Diamond Burrs Bits Diamond Cutting Grinding Diamond BBurr Rotary Tool Grinding Head Nail Drill Bits Cutting Wheel Bit ItemPackageDimensions_Height : 11 centimeters ItemPackageDimensions_Length : 1.2 centimeters ItemPackageDimensions_Width : 7.4 centimeters ItemPackageQuantity : 10 ItemShape1 : Wheel ItemShape2 : Cylindrical ItemTypeKeyword : cutting-burs Manufacturer : Driak Material : Metal ModelNumber : 8mm NumberOfItems : 10 PartNumber : 8mm ProductDescription : Product Name : Grinding Drill Bits; Shape : Cylindrical Material : Alloy ,diamond ; Shank Diameter(Each) : 3mm / 0.12" Each Length : 45mm / 1.77"; Tip Diameter : 8mm/ 0.3" Used for sculpturing, dressing, precision grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many other abrasive materials. Cylindrical tip, diamond coated head. Can be installed on the electronic grinder, hanging mill and hand electric drill (not included here).