JINGLING Diamond Grinding Head 4mm Spherical CONCAVE Stone Carving Burrs 30Pcs

JINGLING 30Pcs 4mm 5/32" SPHERICAL CONCAVE Head Tip Diamond Grinding Bits Lapidary Carving Tools Code 40Q Product Specification: Product Name: 4mm Diamond Grinding Head, Gemstone carving tools, 5/32" Diamond carving burrs Head Diameter: 4mm (Close to 5/32") Total Length: 42mm (1-21/32") Shank diameter: 2.35mm (3/32") Grit: 150 Medium Quantity: Total 30PCS Head Shape: SPHERICAL CONCAVE Head Speed: 2800-50000 RPM, electric grinder speed as high as possible. The diamond mounted point can be installed on the electric grinder, hanging mill and hand electric drill (not included here). Never use drills while machine is in hammer action Product use: Apply to stone carving, jade carving, gem peeled, bone carving, egg decorating, glass carving etc Used for sculpturing, dressing, precision grinding and internal grinding carbide in ceramic, glass, precious stone, alloy and many the abrasive materials Use with water as a lubricant Note: carving must use cold water to cool the workpiece and the grinding head polishing, moment also can't do without water We Can List Any Size (Head Diameter from 0.8mm- 16mm) Amount Of This Product We will send out your order within 1-2 days after payment has been received and cleared Welcome to Visit Our Store: www.amazon.com/shops/DiamondTools30