keylock for sliding patio door

A quick learner from Hayward CA says:
June 12, 2017
Hi,

Style of door:New castle XT/Insulate 960 (see label in pdf)

I need key lock for the door. currently i can only lock from inside.
Door locks on left side.
Please advise if you have parts to make this into key lock entry.

Thanks.
User submitted photos of patio door hardware.
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Dave Sr. from SWISCO responded:
June 16, 2017
Take a look at our 82-081 patio door handle with a key lock. See if this matches up to the one you need for your door. I would just go over our dimensions to be sure.
A quick learner from Hayward CA says:
June 19, 2017
Hi, Dave

I opened the four screws on the latch mechanism and i see few gears mechanism to turn the lock (from inside).
Handle have no screws to open them per 82-081 drawing i found on your website.
How does one dismantle this lock? Pl advise.

Thanks.
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Tom from SWISCO responded:
June 22, 2017
Looking at your pictures, there don't appear to be any screws on the side, which is weird. Could they be on the other side we can't see? I'm actually not sure how else you are supposed to remove these. Every lockset I know of in this style has screws.
A quick learner from Hayward CA says:
June 22, 2017
Yes there are no screws whatsoever on the handles.
i can open the screws in the latch mechanism if that gives any ideas.

As i mentioned when i open it, i saw gear teeth driving the latches with the lever on the handle.
Outside handle is just a pull handle.
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Tom from SWISCO responded:
June 26, 2017
I'm afraid we're really at a loss for this one. Without any screws I really can't see how these are supposed to be replaced. I would assume the manufacturer wouldn't have these permanently installed on the doors, but you never know. I think your best bet would be to contact a local professional familiar with homes in your area. I've never seen anything like this before.
Double Hook Mortise Lock
Double Hook Mortise Lock
82-238
$39.80
Keyed Mortise Style Handle Set, 4-15/16"
Keyed Mortise Style Handle Set, 4-15/16"
82-081
$62.05
Mounting Plate
Mounting Plate
82-108
$7.97
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