Specification Brand : RUKO BulletPoint1 : To produce cuts for cylinder head bolts, hex bolts and nuts. BulletPoint2 : Great for burr-and chatter-less sinks in steel, cast iron, non-ferrous and light metals. BulletPoint3 : Great results at low cutting speed. BulletPoint4 : High-Speed Steel; Excellent toughness, wear resistance, and red hardness BulletPoint5 : Each counterbore comes with a built-in pilot to maintain alignment while drilling CuttingAngleString : 60.0 degrees ExternallyAssignedProductIdentifier1 : 4007140004345 ExternallyAssignedProductIdentifier2 : 04007140004345 FinishType : Uncoated GpsrSafetyAttestation : 1 IncludedComponents : 1x Router Bit ItemName : Ruko 102407 Piloted Counterbore DIN 373 HSS Diameter 20 mm ItemPackageDimensions_Height : 10.1 centimeters ItemPackageDimensions_Length : 2.3 centimeters ItemPackageDimensions_Width : 2.6 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : counterbores Manufacturer : Ruko Material : High-Speed Steel MeasurementSystem : Imperial ModelNumber : 102407 NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 7 PackageLevel : unit PartNumber : 102407 ProductDescription : Overall Length - 4 5/16", Shank Diameter - 1/2" x 3 1/16", Pilot Hole Diameter - 3/16". Used in spot facing and counterboring operations. . These counterbores can be used with a wide variety of pilots. The shank diameter of the pilots ordered must be the same as the pilot hole size in the counterbore. We stock a complete range of pilots; please inquire. ProductSiteLaunchDate : 2012-08-07T17:09:28.315Z Style : Inch SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Alloy Steel SurfaceRecommendation1 : Metal SurfaceRecommendation2 : Alloy Steel SurfaceRecommendation3 : Cast Iron UnitCount : 1 UnspscCode : 27111701