JINGLING 0.4mm Diamond Hole Saw Cylindrical Head Grinding Drill Bits Lapidary Tools for Stone Pack of 30Pcs

• Diamond grinding head is ideal tools for drilling stone, glass apparatus, tile, jade carvings
• Head Diameter:0.4mm; The positive tolerance of the head diameter of the grinding bit is 0.1-0.2mm
• Shank Diameter: 2.35mm(3/32"); Suitable for electric nail drill, carving machine with a 3/32" collet
• Used for sculpturing, dressing, grinding ceramic, glass, precious stone, alloy carbide
• Product Name: Lapidary Diamond Drill Bits, Diamond Drill Bits for Stone, Gemstone Drill Bits

JINGLING 30Pcs 0.4mm Diamond Coated Grinding Bits for Jewelry Gemstone Glass Tile Marble Granite Code 4A The diamond coated grinding bit is suitable for use in grinding process on jewelry, gems, glass, marble, tile or granite Product Specification: Product Name: Lapidary Diamond Grinding Bits, Diamond Carving Tools for Stone Head Diameter: 0.016"(0.4mm) Total length: 1-21/32"(42mm) Head length: 1/8" (3mm ) Shank Diameter: 3/32" (2.35mm); Suitable for electric nail drill, carving machine with a 3/32" collet Recommended speed: 5000-50000 RPM Quantity: 30 Pcs Drilling speed: Drill a hole in seconds Use with water as a lubricant Quick Tips 1. Please add water for coolant and drill slowly 2. Never use drills while machine is in hammer action 3. Holes require no futher work as cutting is clean Suitable for use in drill hole on jewelry, gems, glass, marble, tile or granite Used for drill hole, sculpturing, precision grinding and internal grinding in ceramic, glass, precious stone, carbide alloy and many other abrasive materials We can list any size (Head Diameter from 0.4mm - 230mm) & amount of this product Just a friendly reminder: The Shank diameter of grinding bit is 3/32" (2.35mm) There are two different collet sizes for Dremel: 1/8"(3mm) 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 1/8" (3mm) chuck,such as:models 3000,4000 If your chuck of Dremel is 1/8" (3mm), maybe you need add the Universal 3-jaw chuck for Dremel