Specification Brand : USA Knifemaker Supply BulletPoint : Original Mira Premium Carbide 90 Deg. Counterbore Cutter Bits.1.350" - 2.500" Range, Long (1.25"-2. BulletPoint1 : One piece construction BulletPoint2 : For #8 Screw BulletPoint3 : High Speed Steel BulletPoint4 : High speed steel material BulletPoint5 : Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit) ExternallyAssignedProductIdentifier1 : 0616639492569 ExternallyAssignedProductIdentifier2 : 616639492569 FinishType : Uncoated IncludedComponents : Reduced Shank Counterbore,1-5/16" D ItemName : Counterbore for #8 Screw HS ItemPackageDimensions_Height : 6.9 centimeters ItemPackageDimensions_Length : 1.3 centimeters ItemPackageDimensions_Width : 1.5 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : counterbores Manufacturer : Michigan Drill Material : Alloy Steel MfgSeriesNumber : G125 ModelNumber : CB-8 NumberOfItems : 1 PackageLevel : unit PartNumber : 502 8 ProductDescription : Use these counter bores create a flat bottomed hole. These special drill bits have a pilot that fits into the already drilled hole. The flutes will widen the hole and create a flat bottom. This flat bottom allows you to have your fastener flush with the surface. These counter bores are designed fillister screws but they should work with your Socket Head screws. You should verify the diameter to make sure. The data for these Counterbores #size pilot dia cut dia #2 .085" .155" #4 .111" .198" #8 .163" .285" ProductSiteLaunchDate : 2018-10-19T07:00:00.000Z Size : One Size Style : Built-In Pilot SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation1 : Wood SurfaceRecommendation2 : Metal UnitCount : 1 UnspscCode : 31161500