Profile: Surelock McGill Ltd. specializes in manufacturing and installing door locking and bolting systems. The multi-point lock Slimline system provides an emergency exit that holds the bolts in their retracted position, indicating that a breach of the exit has occurred. The bolts are held until re-set using a key. Even if a partial attempt is made to release the system, the mechanism holds the bolts in their partially retracted position indicating an attempted breach, or simply tampering. It is suitable for doors up to 2,200 mm tall; over height extensions are available for taller doors. The supplied steel core fixings and bolt are suitable for an outward opening door hung in a timber frame, and a concrete floor.