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:3/16, If using a pilot this is the shank diameter of the pilot you should choose BulletPoint4 : Minimum Cut Diameter: .219" 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) FinishType : Uncoated GpsrSafetyAttestation : 1 ItemName : 21/32" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes, 2 3/4" OAL, (.6562" Diameter), 52221, USA Made ItemPackageDimensions_Height : 10.4 centimeters ItemPackageDimensions_Length : 2.1 centimeters ItemPackageDimensions_Width : 2.7 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : counterbores Manufacturer : Super Tool Material : Carbide MfgSeriesNumber : 902 ModelNumber : 52221 NumberOfItems : 1 PartNumber : 52221 ProductDescription : 21/32" Aircraft Counterbore, Carbide Tipped, (Reduced Shank Counterbore), 1/4" Shank Diameter, 3 Flutes, 2 3/4" OAL, (.6562" Diameter), 52221, USA Made ProductSiteLaunchDate : 2014-11-14T17:09:37.541Z Size : 5 inches SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Cast Iron UnitCount : 1 UnspscCode : 27110000