This is the version 2.0 of the popular dovetail "impossible" puzzle box that i created before. It has different versions to lock the box with magnet only and magnet and the little bump so the box can only open/close on one direction.

The hole for the magnet is 6.5mm diameter 3mm so a magnet of 6mm diameter should be used and glued.

The version with magnet only :

The version with magnet and the little bump :

It's designed so it can be printed at once. No assembly or supports required.