Specification Brand : Drill America BulletPoint1 : High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance BulletPoint2 : Weldon shanks feature a round shank with one of more flats machined into the side for easy indexing and alignment BulletPoint3 : Country of Origin : United States BulletPoint4 : Package Weight: 1.0 pounds BulletPoint5 : Made in USA CuttingAngleString : 82.0 degrees ExternallyAssignedProductIdentifier1 : 887861320672 ExternallyAssignedProductIdentifier2 : 0887861320672 ExternallyAssignedProductIdentifier3 : 00695499615363 FinishType : Ground ItemName : Drill America 5/16" X 21/64"82 Degree Piloted Countersink, WEL Series ItemPackageQuantity : 1 ItemTypeKeyword : single-end-countersinks Manufacturer : Drill America Material : High Speed Steel MfgSeriesNumber : 547 ModelNumber : WELCS10-2 NumberOfFlutes : 1 NumberOfItems : 1 PartNumber : WELCS10-2 ProductSiteLaunchDate : 2013-10-22T08:00:01.000Z Size : 41/64" StreetDate : 2017-03-12T00:00:01Z SurfaceRecommendation : Metals,Stainless Steel,Steel UnitCount : 1