Specification Brand : BGTEC BulletPoint1 : 【Size】2pcs,Dia 20mm(4/5");total length:50mm; workable length 20mm; Hex Shank; Grit #80; Angle:56 degree BulletPoint2 : 【Wide Application】The beveling chamfer bit designed to enlarge holes, polish and bevel for ceramic tile, porcelain tile, marble, granite,Stoneware etc. Also suitable to create round indentation to accommodate pipes or wires. BulletPoint3 : 【Save your money】One beveling chamfer bit can create many holes of different sizes(0MM-20MM). without buying several different core bits. BulletPoint4 : 【Dry or wet use】Suitable for hand drill, bench drill. Electric hand drill at 2000-5000RPM. The slower the speed, the shorter the life. BulletPoint5 : 【Note】This is not a core bit for drilling. It doesn't make holes but it enlarges, polishes and beveles the holes. ExternallyAssignedProductIdentifier : 9001122035735 FinishType : Diamond ItemName : Diamond Beveling Chamfer Bit-BGTEC 4/5" (20mm) Diamond Finger Milling Bits with Hex Shank for Enlarging, Polishing and Beveling The Holes for Marble Granite Ceramic,2pcs ItemPackageDimensions_Height : 57 millimeters ItemPackageDimensions_Length : 50 millimeters ItemPackageDimensions_Width : 25 millimeters ItemPackageQuantity : 2 ItemTypeKeyword : core-drill-bits Manufacturer : BGTEC NumberOfItems : 2 PackageLevel : unit PartNumber : DBT4068M14 ProductDescription : / ProductSiteLaunchDate : 2023-07-20T06:01:59.480Z Size : 20mm(4/5 Inch) SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation1 : Ceramic SurfaceRecommendation2 : Tile UnitCount : 1