Specification Brand : ILOVETOOL BulletPoint1 : Quantity: Only 1 Piece; BulletPoint2 : Outer Diameter:28mm(1-1/8");Internal Diameter:26mm;Shank Diameter:6-8mm;Total Length:51mm; BulletPoint3 : Apply to jade carving, stone carving, bone carving, glass carving etc. Especially suitable for forming and grinding spherical bead, etc. BulletPoint4 : Use with water as a lubricant;Used for sculpturing, precision grinding in precious stone, ceramic, glass, many the abrasive materials. BulletPoint5 : Note: carving must use cold water to cool the workpiece and the grinding head polishing, moment also can’t do without water. CompatibleMaterial1 : Aluminum CompatibleMaterial2 : Ceramic CompatibleMaterial3 : Rubber ExternallyAssignedProductIdentifier1 : 097758363617 ExternallyAssignedProductIdentifier2 : 0097758363617 ExternallyAssignedProductIdentifier3 : 00097758363617 ItemName : ILOVETOOL 28mm Grit 80 Diamond Grinding Bit SPHERICAL CONCAVE Head Mounted Point Jade Carving Lapidary Tools Sculpturing Bead Stone Gems ItemPackageDimensions_Height : 1.38 inches ItemPackageDimensions_Length : 1.38 inches ItemPackageDimensions_Width : 1.38 inches ItemPackageQuantity : 1 ItemShape : B122 ItemTypeKeyword : abrasive-grinding-mounted-points Manufacturer : ILOVETOOL Material : Diamond+Metal Material1 : Rubber Material2 : Diamond Material3 : Ceramic MaximumRotationalSpeed : 68740 rpm ModelNumber : 36361 NumberOfItems : 10 PartNumber : CSWZ-80-6-50mm ProductDescription : Diamond Mounted Point SPHERICAL CONCAVE Head Grinding Bit 28mm Grit 80 Jade Carving Tools Diamond grinding bit Spherical Concave head, Jade carving tools Head Shape: Spherical Concave Head Quantity: Only 1 PieceOuter Diameter:28mm(1-1/8") Internal Diameter:26mm Shank Diameter:6-8mm Total Length:51mm Grit:80 When you need to grind what diameter ball, please choose the same outer diameter of spherical concave head grinding bit.Such as: If you choose 20mm outer diameter of spherical concave head grinding bit, then you can grinding a 20mm outer diameter ball.Because the concave arc is not a semicircle (shallower than a semicircle) Product use: Apply to jade carving, stone carving, bone carving, glass carving etc. Especially suitable for forming and grinding spherical bead, etc. Used for sculpturing, precision grinding in precious stone, ceramic, glass, many the abrasive materials The speed of 2000-10000 r/min The Diamond grinding head can be installed on the Bench drilling machine, hand electric drill (not included here). Never use drills while machine is in hammer action. 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 Provide other Size & Grit of the Diamond Mounted Point SPHERICAL CONCAVE Head. ProductSiteLaunchDate : 2017-11-19T16:00:00.000Z Size : Outer Diameter 28mm(1-1/8") StreetDate : 2017-12-06T00:00:01Z Style : B122 UnitCount : 10