Replacement patio door lock

Question

I'm hoping to source a replacement patio door lock. I've attached photos showing a working patio door lock for reference (the two hooks are out) and the broken part - where only one hook works. There was a broken piece inside the lock such that one hook doesn't move anymore.

This part is almost identical - esp in dimension - except for the fact it has a square drive, whereas my existing one appears to have a small, flat-head style drive.

https://www.swisco.com/double-hook-mortise-lock/pd/Patio-Glass-Door-Replacement-Internal-Locks/82-238

Can you advise? Thank you!

Bob · Accepted Answer

I agree the 82-238 Mortise Lock is our best match, but that keyway shape might be an issue. Your thumb lever looks more like our 82-106, but our handle sets compatible with this mortise lock, such as the 82-080, use the 82-240 Thumb lever instead. Therefore you might need to replace the handle set with our 82-080 or keyed 82-081. I can't be certain, but this may be your best option if the 82-238 doesn't work on its own.