This relatively hard puzzle is comprised of two parts: the “lock” which contains an inside maze and the “key” which is a cylinder with a small lug that prevents the “key” to be removed from the “lock” unless the lug follows the solution path to the maze.
To print it, just use the “KeyLockMaze v4_0.2mm_PLA_MK3SMMU2S_4h36m.gcode” file. It will print both parts.
If you have difficulties with the puzzle, you can print the solution file which contains a flattened version of the maze inside the cylinder.
The author marked this model as their own original creation.