Specification Brand : ERmoda BulletPoint1 : 2pcs Vacuum Brazed Diamond finger bits Milling bits for tile, stone, countertop Diameter 15mm BulletPoint2 : Diameter 15MM,50MM workable length, 5/8-11 thread, Total Length: 65mm, Grit #50/60 BulletPoint3 : Designed to enlarge, shape and/or round bevel existing holes in Porcelain,Marble,Granite and Hard Ceramic. BulletPoint4 : Used on angle grinder,Wet or Dry using Grit #50/60 provide you great finishing BulletPoint5 : Arbor Adapter: The adapter converts M10 thread to 3/8-inch (9.5mm) triangle shank. Fits most bench drills, hand electric drills. Tips: Reduced drill speeds, low drill pressure and increased use of water lubrication will extend drill bit life considerably. Color : Gold Tone DataTransferRate : 4500 megabytes_per_second DigitalStorageCapacity : 1 TB ExternallyAssignedProductIdentifier : 4711377279963 ExternallyAssignedProductIdentifier1 : 840145811396 ExternallyAssignedProductIdentifier2 : 0840145811396 FinishType : Diamond GpsrSafetyAttestation : 1 HardwareInterface : pci_express_x4 ItemName : ERmoda Core Drill Bit Hole Core Drill Core Diameter: 22mm ItemPackageDimensions_Height : 15.7 centimeters ItemPackageDimensions_Length : 2 centimeters ItemPackageDimensions_Width : 8.1 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : core-drill-bits Manufacturer : ERmoda Material : Artificial diamond and Steel body Material1 : Diamond Material2 : Alloy Steel ModelNumber : S78-440L0J0-P83 NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 2 PackageLevel : unit PartNumber : 080151A6 ProductDescription : ==============DESCRIPTION ============== Item: Vacuum Brazed Diamond finger bits Milling bits for tile, stone, countertop Quantity: 1pc Specification: 15MM Diameter, 50MM workable length, 5/8-11 thread, Total Length: 65mm, Grit #50/60 Application: 1. Enlarge, shape and/or round bevel existing holes in Porcelain, Hard Ceramic, marble and granite 2. Also available to make a hole directly, but not recommend to do this job. 3. Used on angle grinder Feature: 1. Vacuum brazed technology provide high efficient working performance 2. Grit #50/60 provide you great finishing 3. Very easy to operate. 4. 1pc standard core bit + 1pc Finger bit, be able to create many different sizes of holes, not need to buy several different core bits. ================THE END================ Available diameter: Dia 10mm, 20mm, 25mm