Patio Door

Thanks for posting! Are you looking to replace the entire handle set, the key lock, or the internal mortise lock. If you are looking to replace the handle set, yours resembles the 82-086 Legacy Keyed Handle Set. This handle set uses the 82-310 Key Lock.

If you are looking to replace the internal mortise lock, I'll need to see a photo of the existing lock. There are a few compatible with the handle set you have.

Dimensions for 82-086

Alternate view of 82-310