sturdier lock

A quick learner from USA says:
February 6, 2017
I have a flush mount patio door latch (looks like your 82-008K) on my sliding door on my boat. I need a sturdier locking mechanism with a key. Any options to retrofit with a better locking mechanism? The door can also be lifted out of its track to gain entry since it is on the outer track.
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Dave Sr. from SWISCO responded:
February 13, 2017
I'm afraid they don't really make a sturdier version of this lock. They pretty much just make it one way. If you need a higher security lock then you would need to contact a locksmith in your area to see if they have a better solution.
Patio Sliding Handle Set with Keyed Lock, 6-5/8"
Patio Sliding Handle Set with Keyed Lock, 6-5/8"
82-002K
$24.20
Sliding Door Keyed Handle Set, 6-5/8"
Sliding Door Keyed Handle Set, 6-5/8"
82-008K
$24.92
How to install the 82-002K sliding door handle key plug
How to install the 82-002K sliding door handle key plug
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