Specification Brand : ILOVETOOL BulletPoint1 : Quantity:Only 1 Piece;Grit:400 Fine;Shank Diameter:6-8mm;Total Length:51mm; BulletPoint2 : Outer Diameter:25mm(close to 1"); Internal Diameter:23mm BulletPoint3 : The speed of 2000-5000 r/min;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. Color : Silver CompatibleMaterial1 : Aluminum CompatibleMaterial2 : Alloy Steel ExternallyAssignedProductIdentifier1 : 0708747505566 ExternallyAssignedProductIdentifier2 : 708747505566 ExternallyAssignedProductIdentifier3 : 00097758334464 ItemName : ILOVETOOL 25mm 1" Grit 400 Diamond Mounted Point SPHERICAL CONCAVE Head Grinding Bit Jade Carving Tools Sculpturing Bead Stone Gem ItemPackageDimensions_Height : 1.31 inches ItemPackageDimensions_Length : 1.5 inches ItemPackageDimensions_Width : 1.31 inches ItemPackageQuantity : 1 ItemShape : W170 ItemTypeKeyword : abrasive-grinding-mounted-points Manufacturer : ILOVETOOL Material : Diamond+Metal MaximumRotationalSpeed : 52500 rpm ModelNumber : 33446 NumberOfItems : 1 PartNumber : XSWZ-400-10-50mm ProductDescription : Diamond Mounted Point SPHERICAL CONCAVE Head Grinding Bit 25mm Grit 400 Jade Carving Tools Diamond grinding bit Spherical Concave head, Jade carving tools Head Shape: Spherical Concave Head Grit: 400 Fine Quantity: Only 1 PieceOuter Diameter:25mm(close to 1") Internal Diameter:23mm Shank Diameter:6-8mm Total Length:51mm 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 2000-5000 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 : 2017-11-19T08:00:00.000Z Size : Outer Diameter 25mm StreetDate : 2017-10-21T00:00:01Z Style : W170 UnitCount : 10