Specification Brand : Carr Lane Manufacturing BulletPoint1 : A: 1/2 BulletPoint2 : B: 3/8 BulletPoint3 : C: 1/4-28 ItemName : CL-16-SG Carr Lane Manufacturing Square Gripper, Hardened Tool Steel: Diameter 1 ItemTypeKeyword : ball-and-socket-universal-joints Manufacturer : Carr Lane Manufacturing PartNumber : CL-16-SG ProductDescription : Square Grippers are similar to Round Grippers, but their shape is useful when positive resistance to rotation is required (they can be mounted against a step to prevent rotation). These serrated grippers are hard, replaceable inserts used to provide additional holding force and/or wear resistance when installed in a fixture. They are designed to slightly penetrate the workpiece to significantly increase gripping force, rather than relying on static friction alone. The hardened tool steel grippers shown here are the most economical and impact resistant. Made in USA. ProductSiteLaunchDate : 2013-12-31T00:29:56.387Z SupplierDeclaredDgHzRegulation : unknown