Specification Brand : Super Tool BulletPoint1 : For counterboring and spotfacing in applications where machine requires a smaller shank BulletPoint2 : 1/64" Corner Radius, Tool Diameter Tolerance: +.001"/-0". Shank Diameter Tolerance: +0"/-.001" BulletPoint3 : Pilot Hole Diameter:5/16, If using a pilot this is the shank diameter of the pilot you should choose BulletPoint4 : Minimum Cut Diameter: .343" Because there is a pilot hole the tool will not cut below this diameter. BulletPoint5 : Set screw to hold a pilot or drill bit in place (if you are using a pilot or drill bit) ExternallyAssignedProductIdentifier1 : 650361806324 ExternallyAssignedProductIdentifier2 : 0650361806324 IncludedComponents : Reduced Shank Counterbore,1-5/16" D ItemName : 2" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/2" Shank Diameter, 3 Flutes, 3 1/16" OAL, (2" Diameter), 52264, USA Made ItemPackageDimensions_Height : 2.5 inches ItemPackageDimensions_Length : 3.3 inches ItemPackageDimensions_Width : 2.5 inches ItemPackageQuantity : 1 ItemTypeKeyword : counterbores Manufacturer : Super Tool Material : Carbide ModelNumber : 52264 NumberOfItems : 1 PackageLevel : unit PartNumber : 52264 ProductDescription : 2" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/2" Shank Diameter, 3 Flutes, 3 1/16" OAL, (2" Diameter), 52264, USA Made ProductSiteLaunchDate : 2014-11-14T17:17:53.607Z Size : One Size Style : Built-In Pilot SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 27110000