The Yale PM552 5 Lever Deadlock is a high-security mortice locking solution designed for timber doors. This deadlock features a 5-lever mechanism that operates via key from both sides, providing reliable security for residential or commercial installations. Measuring 2.5 inches (65mm), it is suited for standard door fitting and replacement requirements. The lock is finished in polished chrome, which offers a clean, professional aesthetic for exposed faceplates and keeps the hardware consistent with existing door furniture. As a dedicated deadlock, it functions exclusively with a key-operated bolt, excluding latch operation.