. From durable mechanical locks to comprehensive electronic access control solutions and biometrics, Schlage provides protection at critical moments–when property and personal security are at stake.S251PNEP613 S200 Interconnected Entry Double Locking Neptune Lever C Keyway 16-481 Latch 10-109 In homes, public buildings, and the workplace, at the end of the day, Schlage stands for one thing: strong. We have been meticulous designers, painstaking engineers, and proud craftsmen.