Specification Brand : ANTENGDATOOL BulletPoint1 : Core Drill Bits Adapter 5/8-Inch-11 Thread Male to 5/16 In. Round Shank, 3Pieces/Pack BulletPoint2 : Application for hole saws, drill bits, backer pads, grinding wheels which arbor is 5/8-Inch-11 BulletPoint3 : Change the arbor from 5/8"-11 thread to 5/16 In. Round Shank BulletPoint4 : Notice: Use these adaptes on machine like drills machines, they will change the connection from round shank to 5/8"-11 thread male BulletPoint5 : If you have any questions, welcome to contact us, we have good after-selling service, we provide 100% refunding or repalcement if there any quality problems BulletPoint6 : Our BLUEROCK brand core drills have a 1 1/4" spindle. Please see the 1 1/4” to 5/8” adapter if using this bit with our core drill. Color : Green CompatibleMaterial1 : Porcelain CompatibleMaterial2 : Ceramic CompatibleMaterial3 : Marble CuttingAngleString : 45.0 degrees ExternallyAssignedProductIdentifier1 : 849724073873 ExternallyAssignedProductIdentifier2 : 0849724073873 ExternallyAssignedProductIdentifier3 : 4710810406058 ExternallyAssignedProductIdentifier4 : 04710810406058 FinishType : Diamond GpsrSafetyAttestation : 1 ItemName : 3Pieces/Pack Core Drill Bits Adapter 5/8-Inch-11 Thread Male to 5/16 in. Round Shank by Antengdatool ItemPackageDimensions_Height : 2.8 centimeters ItemPackageDimensions_Length : 8.5 centimeters ItemPackageDimensions_Width : 8.5 centimeters ItemPackageQuantity : 3 ItemTypeKeyword : core-drill-bits Manufacturer : Shanghai Antengda Tools Co., Ltd. Material : steel body ModelNumber : CDBA58TR01x3 NumberOfFlutes : 3 NumberOfItems : 3 NumberOfPieces : 3 PackageLevel : unit PartNumber : CDBA58TR01x3 ProductDescription : Antengdatool Core Drill Bits Adapter 5/8-Inch-11 Thread Male to 5/16 In. Round Shank