Key to unlock bathroom door with 5 mm square shaft

Key to unlock bathroom door with 5 mm square shaft

thingiverse

My 2-year-old is constantly going into the bathroom and locking himself in. From the outside, there is a 5mm square shaft which I can turn with pliers to unlock. I made this key so I don't have to fetch the pliers every time. I printed this in PETG but really almost any material will do.

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