First disassemble then re-assemble! This one will have you scratching your head.
There are two goals to the Cast Nutcase created by the Dutch puzzle inventor, Oskar:
1. Remove the small nut by disassembling the Cast Nutcase.
2. Cast puzzle enthusiasts (nutcases) can enjoy trying to change the wording on the bolt from ‘nut-case’ to ‘case-nut’.
The key word for this level 5 puzzle is “Interlocking”.