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) ExternallyAssignedProductIdentifier1 : 807200029103 ExternallyAssignedProductIdentifier2 : 0807200029103 FinishType : Uncoated ItemName : 5/8" Counterbore, Carbide Tipped, 3 Flutes, 1/2" Shank Diameter, Straight Shank, 5 1/8" OAL, USA Made, (.625" Diameter), 59807 ItemPackageDimensions_Height : 5.3 inches ItemPackageDimensions_Length : 1 inches ItemPackageDimensions_Width : 1 inches ItemPackageQuantity : 1 ItemTypeKeyword : counterbores Manufacturer : Super Tool Material : Carbide ModelNumber : 59807 NumberOfFlutes : 2 NumberOfItems : 1 PartNumber : 59807 ProductDescription : 5/8" Counterbore, Carbide Tipped, 3 Flutes, 1/2" Shank Diameter, Straight Shank, 5 1/8" OAL, USA Made, (.625" Diameter), 59807 ProductSiteLaunchDate : 2014-11-14T17:10:33.386Z Size : 40 Series Style : Counterbore Cutter Drill Bit SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation : Aluminum SurfaceRecommendation1 : Metal SurfaceRecommendation2 : Wood UnitCount : 1 UnspscCode : 27111700