Sliding door latches, no key access or other on the outside.

Check out our 82-043. This is Andersen's updated style of your existing latch, but go over the dimensions just to be safe. Make sure to check your mortise lock to ensure that it's working properly. Most of the time, I find that it's the mortise lock that breaks the thumb latch. If that's the case, take a look at our 82-037 mortise lock. The 82-037 is the most popular Andersen mortise lock used with the 82-043 thumb latch.