Lock

I'm not sure if it is possible with this handle set. This actually isn't something I've ever seen before. 

It's easy enough to figure out, though. If possible, please remove the exterior pull and show me a picture of its underside. While that handle is off, please also take a photo of the spot on the door where it usually installs. I'm specifically looking for the hole where the key lock would go to interface with the mortise.

Thanks!

Thank you. I don't think any of our key locks can install on this exterior pull. With that in mind, I recommend using our 82-030 handle set instead, along with the 82-310 key lock (sold separately).

We also have a guide on this hardware here that may be of some help to you for this project.