Is your getting to large. Here is your free open source solution.
(I call it the key solution ;)
Just make sure to use either:
- a self locking nut like in the picture (you can see the small blue plastic piece inside the nut)
- to nuts that you interlock
- a little bit of glue on the nut (you can open it again by making it hot)

@cy I did a swiss army knife version, out of two ddr2-ram modules and two screws with selfocking nuts.
But it didn't solve the destruction of my trousers pockets.
Now I have one of those old fashioned pockets with a zipper, where I put my keys into. No more damaged pockets. :)

@cy would non-permanent threadlocker not work instead of glue?

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