Specification Brand : BGTEC BulletPoint1 : Total 2pcs: 1pc Spherical grinding head( Diameter 50mm, Thickness 35.5mm,Grit #35/40);1pc Hex Adapter(Total length 53mm,Shank length 28mm,Thread length 15mm) BulletPoint2 : Vacuum brazing process offers much longer service life BulletPoint3 : #35/40 diamond grit improves grinding speed and speed stability BulletPoint4 : Diamond spherical grinding head design makes the stone flatter and smoother BulletPoint5 : When installed on the angle grinder, it can be installed directly, or an extension rod can be added.Recommended speed is 6000RPM,Max speed is 11000RPM; When installed on a hand drill, a hexagon shank adapter have to be added.Recommended speed is 2000-5000RPM,the slower the speed,the shorter the life. Color : Black CompatibleDevices : Angle Grinder, Hand Drill CompatibleMaterial : Porcelain, Ceramic, Stone, Masonry Brick, Quartz, Glass, Marble, Mirror ConstructionType : Super-Abrasive CuttingAngleString : 45.0 degrees ExternallyAssignedProductIdentifier1 : 799964006882 ExternallyAssignedProductIdentifier2 : 0799964006882 FinishType : Diamond GpsrSafetyAttestation : 1 IncludedComponents : diamond ItemName : BGTEC Diamond Milling Bits,50mm Stone Spherical bit Plus Hex Adapter for Stone Flowerpot,Cobblestone,Marble,Granite,Quartz,Artificial Stone ItemPackageDimensions_Height : 11.2014 centimeters ItemPackageDimensions_Length : 5.588 centimeters ItemPackageDimensions_Width : 5.588 centimeters ItemPackageQuantity : 2 ItemShape : Round ItemTypeKeyword : core-drill-bits Manufacturer : BGTEC Material : Alloy Steel Material1 : Diamond Material2 : Alloy Steel MaximumRotationalSpeed : 11000 rpm ModelNumber : GBS0150S2N58 NumberOfFlutes : 1 NumberOfItems : 2 NumberOfPieces : 1 PackageLevel : unit PartNumber : GBS0150S2N58 ProductDescription : Item: 50mm Stone Spherical bit, Diamond Milling Bits; Adapter 5/8-11 male thread to 3/8 hexagon shank Specification: Stone Spherical bit-Diameter 50mm, Thickness 35.5mm,Grit #35/40; Hex adapter-total length 53mm,Shank length 28mm,Thread length 15mm Quantity: 2pcs Application: 1. Suitable for stone flowerpot,cobblestone,marble,granite,quartz,artificial stone and similar materials 2. When installed on the angle grinder, it can be installed directly, or an extension rod can be added.Recommended speed is 6000RPM,Max speed is 11000RPM; When installed on a hand drill, a hexagon shank adapter have to be added.Recommended speed is 2000-5000RPM.The slower the speed,the shorter the life. Feature: 1. Grinding stones of different sizes with only a hex adapter or an extension rod; 2. Spherical grinding head allows all-round grinding,fine diamond coated makes DIY flowerpot or fish tank smoother and efficient; 3. Vacuum braze technology prolongs working life.