Photograph the edge preparation and both door faces. A different lock body may require work beyond a straightforward compatible swap. Structural alteration, rebuilding damaged sections and specialist door-system changes are excluded rather than assumed to be part of replacement hardware fitting.
Identify whether the supplied product matches the ordinary existing lockset arrangement. Similar handles can conceal different mechanisms. This task excludes emergency entry, key cutting, rekeying, specialist security advice and powered access systems; it starts with authorised access to the door.
Hardware must suit the leaf thickness and the maker’s permitted range. Spindles and fixings are not interchangeable solely because the finish matches. Provide the door specification where possible and keep the complete supplied pack together until the fit is reviewed.
Replace suitable ordinary mechanical hardware in the compatible existing preparation and check its operation with the authorised customer. Scope limits: Authorised ordinary compatible mechanical lockset replacement only. No lockouts, emergency entry, key cutting, rekeying, locksmith security services, rated-door work or electrical integration.