The distance from the door edge to the operating centre affects compatibility. Share the product drawing and existing measurement if safely available. An incorrect backset can place the handle or mechanism against old holes, so check before purchasing a replacement.
The person arranging the job must have authority for the property and hardware change. For a rental or managed property, agree the appropriate permission and access contact. An enquiry does not establish ownership or authorise gaining entry to a locked property.
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.
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.