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How to Replace a Ferco 528 Multipoint Lock in an Atrium Door

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This is a multipoint lock with 5 locking points (a spring latch, two rollers and two shootbolts) and a backset of 28mm (measured from the face of the lock to the middle of the cylinder). The Ferco 528 lock is still being manufactured, although there have been some changes, and the new locks cannot be directly installed in older Atrium doors without some modifications being made. The article will guide you through the process of replacing an old-style Ferco 528 lock (part #499047599) with a new-style (part #4990475).

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