This plug follower is structured to be used with the most common brand of cylinders. The applications it can be used for include Acro Lock, Arrow, Corbin, Dexter, Eagle, Ilco, Keil, Kwikset, Lockwood, National, Rockford National, Nesco, Russwin (0.500 Dia), Sargent, Schlage, Taylor, Weiser (except Beverly style), Welch and Yale. It is designed from ground accuracy stock with a corrosion resistant black oxide finish.