Specification Brand : Super Tool BulletPoint1 : For Counterboring most materials BulletPoint2 : Tool diameter tolerance: +.001"/-0". Shank Diameter Tolerance: +0"/-.0005" BulletPoint3 : Pilot Hole Diameter:1/4, If using a pilot this is the shank diameter of the pilot you should choose BulletPoint4 : Minimum Cut Diameter: .29" 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 : 13/16" Counterbore, Carbide Tipped, 3 Flutes, 5/8" Shank Diameter, Straight Shank, 5 3/8" OAL, USA Made, (.8125" Diameter), 59810 ItemPackageDimensions_Height : 5.5 inches ItemPackageDimensions_Length : 1.25 inches ItemPackageDimensions_Width : 1.25 inches ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : counterbores Manufacturer : Super Tool Material : Carbide Material1 : Carbide Material2 : Alloy Steel ModelNumber : 59810 NumberOfFlutes : 3 NumberOfItems : 1 PartNumber : 59810 ProductDescription : 13/16" Counterbore, Carbide Tipped, 3 Flutes, 5/8" Shank Diameter, Straight Shank, 5 3/8" OAL, USA Made, (.8125" Diameter), 59810 ProductSiteLaunchDate : 2014-11-14T17:13:55.206Z SupplierDeclaredDgHzRegulation : not_applicable SurfaceRecommendation1 : Metal SurfaceRecommendation2 : Plastic SurfaceRecommendation3 : Wood SurfaceRecommendation4 : Concrete SurfaceRecommendation5 : Masonry UnitCount : 1 UnspscCode : 27110000