A sliding door lock that is very strong and as unobstructive as possible (hides in the corner). Insert the bolt in the bottom hole, push it to the end and give it a twist (so it doen's fall down). Reverse to open. The bolt can be stored in the base if not used. Print the bolt with 100% infill for strongest results. I printed mine with 4 walls and gyroid infill and it didn't break.

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