Check the listing for details. 30Pcs Diamond Grinding Bits Set Stone Carving Tools 3/32" Shank for Nail Drill. Color: Silver, Condition: New. Listed at 14.99 USD. JINGLING 30Pcs Diamond Coated Grinding Bits Set Grit 120 Rotary Burrs with 2.35mm(3/32") Shank A new box of 30Pcs mini file sets, including diamond drill bits, rock carving tools, etc Specifications and shapes: Heads Shapes: ball, cylinder, bullet, cone, needle point Total length: 45mm (1-3/4" inch) Shank diameter: 2.35mm (3/32" inch) Suitable for electric nail drill, carving machine, rotary tools with a 3/32" collet Quantity: Total 30 Pcs Diamond Burrs Grit: 120 (medium) The stone carving kit is made of carbon steel and GR-2 quanlity diamond powder, making these rock carving tools particularly sturdy, sharp, durable and long lasting as well. Premium type diamond coated in grit 120 (medium), more durable than the ordinary diamond coated burr Use with water as a lubricant is better Suitable for use in grind the edge of glass, stone, shells, nail, tile or jewelry Mainly used for carving glass, jade, fixed abrasive and hard objects. Diamond grinding head is processes each kind of mold, hard alloy, glass apparatus, ideal correction tools such as nail care, jade carvings. Just a friendly reminder: The Shank diameter of grinding bit is 2.35mm (close to 3/32") There are two different collet sizes for Dremel: 3mm (1/8") or Universal 3-jaw chuck If your chuck of Dremel (models 4300-8050) has an Universal 3-jaw chuck, then the grinding bit can be installed directly However, it is NOT suitable for dremel with 3mm 1/8" chuck (such as:models 3000,4000) If your chuck of Dremel is 3mm (1/8"), maybe you need replace the copper chuck on the front of Dremel.