Specification Brand : Super Tool BulletPoint1 : For Counterboring most materials BulletPoint2 : Tool diameter tolerance: +.001"/-0". Shank Diameter Tolerance: +0"/-.0005" 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: .228" 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) ItemName : 17/32" Counterbore, Carbide Tipped, 3 Flutes, 1/2" Shank Diameter, Straight Shank, 4 5/16" OAL, USA Made, (.5312" Diameter), 5795312 ItemPackageDimensions_Height : 11.938 centimeters ItemPackageDimensions_Length : 2.032 centimeters ItemPackageDimensions_Width : 2.032 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : counterbores Manufacturer : Super Tool Material : Carbide ModelNumber : 5795312 NumberOfFlutes : 3 NumberOfItems : 1 PartNumber : 5795312 ProductDescription : 17/32" Counterbore, Carbide Tipped, 3 Flutes, 1/2" Shank Diameter, Straight Shank, 4 5/16" OAL, USA Made, (.5312" Diameter), 5795312 ProductSiteLaunchDate : 2014-11-14T17:18:54.448Z SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Cast Iron UnitCount : 1 UnspscCode : 27111700