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The DON-JO CW55S is a classic wrap around plate designed to reinforce door lock installations on doors with an extended or converted backset. Built for 1-3/4 inch doors with a 5 inch backset, this plate provides a protective and finished surround for cylindrical locksets and deadbolts. Constructed in stainless steel, it resists corrosion and wear in high-traffic commercial and residential entryway applications. The CW55S is a standard hardware-trade installation, typically handled by locksmiths, door hardware installers, or commercial finish carpenters working on cylindrical lock retrofits or conversions.
This wrap around plate is suited for applications where an extended or converted backset is required, such as door replacement or lock conversion projects where the original door prep does not match standard backset dimensions. It is appropriate for use on 1-3/4 inch thick doors in both commercial and residential settings where a clean, reinforced lock face is needed after backset modification.
Designed as an OEM-style replacement or upgrade wrap around plate for cylindrical lockset and deadbolt installations on 1-3/4 inch doors with a 5 inch extended or converted backset.
Installation is typically performed by a licensed locksmith or qualified door hardware installer. Power down any access control or electric strike hardware associated with the door before beginning work. Confirm door thickness and backset measurement before installing to ensure proper alignment with the existing lock prep. Follow applicable building and fire-egress codes when installing hardware on rated door assemblies.
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