Much better than his previous 'cam locks' which had the locking catch inside the tank.
If the key was in the lock, the catch could be turned.
[which he figured out]
This lock has nothing inside.
It's screwed to one sliding pane and restrains the other.
Even if it's accidentally left unlocked, he'd have to figure out how to slide both panes in opposite directions, at once.
No need to worry about the ends.
The front panes slide 2 inches into "pockets" created by the double framed front.
[the panes are mounted inside 'tracks']
There's 2 inches of 1/2" acrylic pane on each end that you can't see because it's inside the 'pocket' created by the frames.
Out of several versions, this 'lock up' was the most secure idea we had.
[and yes, we took his uncanny 'talents' into account]
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