Silver Line 5800
Hey there,
Thanks for your post! We can supply the replacement for the patio door handle set you have but you may want to check the rollers and the door track for any debris and/or damage. Handles typically break like this when excessive force has been placed on them due to one of those issues. That said, replacing the handle may only be a temporary fix. I've included tutorials below with instructions on how to remove/install them and what we need to identify the correct replacement.
The handle set reminds me of the 82-086 Legacy Keyed Handle Set. To determine if this is the correct replacement, carefully look over the specifications and compare them.