Nail Puzzle Box

This is a puzzle box that I was inspired to make after I saw a few people solve a wooden version of this on Youtube. The goal is to open the box but it is locked and has nothing on the outside. It is good showpiece, piggy bank, or storage container for secret things. It would also be pretty cool if used for geocashing. Scroll down for the solution to open this box.

The mechanics are pretty simple and it is easy to assemble. 7 nails and a little glue is needed to complete the project. The nail