|Packing per CTN||:||48(12)|
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 (nutcase) can enjoy trying to change the wording on the bolt from 'nut-case' to case-nut'.
The key word is "interlocking".
Hanayama Co. 2007