For use on lightweight residential doors in low frequency applications. Non-rising removable flush pin. Five knuckle, full mortise design. Available in square corners (741), 1/4 in (6.4mm) radius corners (RD741) and 5/8 in (15.9mm) radius corners (RD758). Available with non-removable pins (NRP) and brass pins (BP). ST2H galvanized Weathergard finish options.