The Von Duprin 5100 Series has been designed to offer flexibility an dconvenience for locksmiths and other security professionals. Created for medium duty applications, the 5100 Series is ideal for traffic control through interior and exterior openings in retail and commercial applications. The 5100 Series is compatible with a wide range of cylindrical locks and is very versatile for field conversions. It includes three faceplates and has field selectable voltage and fail safe/fail secure modes. It also has an adjustable keeper to improve the fit for applications with a tight door fit.