Check the listing for details. 20Pcs Diamond Grinding Bits 2mm Spherical Head Ball Bur Lapidary Tools for Stone. Color: Silver, Condition: New. Listed at 13.99 USD. JINGLING 20Pcs Diamond Grinding Bits Coated 2mm Dia Spherical Head with 2.35mm Shank Code 20F Specification: Product Name Diamond grinding bits Tip Shape Round Ball / Spherical Material Metal, Diamond Head Diameter 2 mm ( 0.08" inch) Shank Diameter 2.35 mm (Close to 3/32") Total Length 42mm ( 1-21/32") Grit 100 (Coarse) Color Silver Tone Quantity 20Pcs Description: Shank Diameter:2.35mm(3/32"); Suitable for electric nail drill, carving machine with a 3/32" collet. Used for sculpturing, dressing, precision grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many other abrasive materials. Diamond grinding head is processes each kind of mold, hard alloy, glass apparatus, ideal correction tools such as jade carvings. The electroplating diamond assorted grinding head grinding needle bar fine polishing grinding, diamond grinding head is mainly used for electric and pneumatic tools. Use with water as a lubricant is better Adding water when use the diamond grinding head is good, can improve the sharpness and the life We will send out your order within 1-2 days after payment has been received and cleared. Please let us know if you are looking for other accessories or hardware. We Can List Any Size & Amount Of This Product: Head diameter from 0.8 mm to 40 mm Just a friendly reminder: The Shank diameter of grinding bit is 2.35mm (3/32" inch) 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 add the Universal 3-jaw chuck for Dremel