Specification Brand : Vermont Gage BulletPoint1 : High Speed Steel, BulletPoint2 : Short Series BulletPoint3 : Straight Shank ItemName : 21/64" Interchangeable Pilot Counterbore ItemTypeKeyword : counterbores Manufacturer : Meda - Superior Import Material : Alloy Steel PartNumber : 1225021 ProductDescription : Overall Length - 3 13/16", Shank Diameter - 5/16" x 3 1/16", Pilot Hole Diameter - 3/32". Used in spot facing and counterboring operations. . These counterbores can be used with a wide variety of pilots. The shank diameter of the pilots ordered must be the same as the pilot hole size in the counterbore. We stock a complete range of pilots; please inquire. ProductSiteLaunchDate : 2012-08-02T15:03:18.232Z UnitCount : 1 UnspscCode : 27111700