Hexagon Rethreading Dies are precision high carbon steel dies, not to be confused with standard Series 3300E Hexagon Dies. Rethreading Dies are extra thick to permit user to rethread damaged or jammed threads and are not intended for producing new threads on unthreaded bar, bolts, or pipes. Dies are same size as standard Hex Nuts. 24mm-2, hexagon rethreading dies, carbon, bright