Impossible dovetail
thingiverse
Mount the device with two magnetic cylinders, each with a diameter of up to 8mm and a height of no more than 4mm. Additionally, place one steel ball with a maximum diameter of 8mm inside the hidden mechanism. To activate the mechanism, gently tap the box to open or close it. For an example operation, refer to the video at https://www.youtube.com/watch?v=xp-PENvptu0.
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