Door lock for children
thingiverse
My little boy can open every door that's within his reach. Commercial locks are tough for the kid and me as well. This easy lock is hard for the kid to figure out but it's a breeze for me. It was made for doors 18 mm thick and 15 mm thick, with 1.5 mm free space on both sides. If you need a different thickness, just let me know and I'll be happy to make it.
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