Some but not all metal brainteasers will come with instructions to help guide users and provide context for solving the puzzle. When instructions are not included, you'll need to figure out how to work with and manipulate the pieces of the metal mind teasers to progress toward a solution.
This process can be more challenging at first compared to solving traditional jigsaw puzzles and other toys and games. For this reason, we recommend doing a bit of research on any specific brainteaser's level of difficulty before purchasing.