Specification Brand : BGTEC BulletPoint1 : diameter 10mm 3/8 Inch,diamond length 10mm,Hex Shank Quick-fit BulletPoint2 : Multi-purpose drilling for granite & marble, masonry, concrete, tile/ceramic, stone BulletPoint3 : Wax inside for cooling,our Diamond Tipped Drill Bits have wax cores built-in which automatically absorb and dissipate heat as you go BulletPoint4 : Dry drilling and Use water for longer time.Notice:Please use with water when drilling granite BulletPoint5 : Vacuum Brazed diamond technology provide very high efficiency,cuts faster and lasts longer 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 : Orange CompatibleMaterial1 : Porcelain CompatibleMaterial2 : Ceramic CompatibleMaterial3 : Marble CuttingAngleString : 45.0 degrees ExternallyAssignedProductIdentifier1 : 769891571432 ExternallyAssignedProductIdentifier2 : 0769891571432 FinishType : Diamond GpsrSafetyAttestation : 1 ItemName : BGTEC Dry Diamond Drill Bits 5pcs 3/8" with Quick Change Hex Shank for Granite Marble Porcelain Tile Ceramic ItemPackageDimensions_Height : 10.0076 centimeters ItemPackageDimensions_Length : 1.6002 centimeters ItemPackageDimensions_Width : 8.1026 centimeters ItemPackageQuantity : 5 ItemTypeKeyword : core-drill-bits Manufacturer : BGTEC Material : Artificial diamond and Steel body ModelNumber : DBT2210U5 NumberOfFlutes : 2 NumberOfItems : 10 NumberOfPieces : 5 PackageLevel : unit PartNumber : DBT2210U5 ProductDescription : Product Name: Hex Shank Quick-fit drilling bits Color: Orange. Application : Dry drilling for granite & marble, masonry, concrete, tile/ceramic, stone..... Specification: Hex shank Quick-fit , available diameter 6mm 1/4", 8mm 5/16", 10mm 3/8", 12mm, 14mm, diamond length 10mm 3/8" Feature: 1.Wax inside for cooling, Dry drilling 2.Vacuum Brazed diamond technology provide very high efficiency, multi-purpose drilling 3.Long life drilling Quick Tips 1.Place the drill at a 45 degree angle 2.Drilling till the hole start to form 3.Bring the drill up into upright position 4.Continue to drill and swaying the machine along a circle