Specification Brand : Vermont Gage BulletPoint1 : High Speed Steel, BulletPoint2 : Short Series BulletPoint3 : Straight Shank ItemName : 39/64" Interchangeable Pilot Counterbore ItemTypeKeyword : counterbores Manufacturer : Meda - Superior Import Material : Alloy Steel PartNumber : 1225039 ProductDescription : Overall Length - 5 1/8", Shank Diameter - 1/2" x 3 7/8", Pilot Hole Diameter - 3/16". 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 : 2012-08-02T15:24:45.483Z UnitCount : 1 UnspscCode : 27111700