5 Lever Mortice Sashlock - G5000This 5 lever mortice sashlock can be operated by a lever handle from either side and the deadbolt is operated by key from either side. Made in the UK by Guardian Locks, this lock is available in various sizes and in many finishes. Typically used on external doors or doors which require a high level of security. SIZES AS FOLLOWS: Lockcase Backset Centres 63mm 45mm 57mm 76mm 57mm 57mm 101mm 82mm 57mm The backset is the distance from the edge of the door