Specification Brand : Super Tool BulletPoint1 : For Counterboring most materials BulletPoint2 : Tool diameter tolerance: +.001"/-0". Shank Diameter Tolerance: +0"/-.0005" BulletPoint3 : Pilot Hole Diameter:5/32, If using a pilot this is the shank diameter of the pilot you should choose BulletPoint4 : Minimum Cut Diameter: .182" 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) CutType : Taper ItemName : 7/16" Counterbore, Carbide Tipped, 3 Flutes, 3/8" Shank Diameter, Straight Shank, 4 1/16" OAL, USA Made, (.4375" Diameter), 56404 ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : counterbores Manufacturer : Super Tool Material : Carbide Material1 : Carbide Material2 : Alloy Steel ModelNumber : 56404 NumberOfFlutes : 3 NumberOfItems : 1 PartNumber : 56404 ProductDescription : 7/16" Counterbore, Carbide Tipped, 3 Flutes, 3/8" Shank Diameter, Straight Shank, 4 1/16" OAL, USA Made, (.4375" Diameter), 56404 ProductSiteLaunchDate : 2014-11-14T17:13:49.772Z SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1 UnspscCode : 27110000