These frightening lethal weapons are in fact very
interesting and unusual descendants of The Gears
puzzle.
They are each three-piece coordinate-motion
puzzles. They use the same interlocking mechanism as The
Gears, but differs by external shape.
To assemble you have to put together three parts
moving them simultaneously towards the center of the puzzle. As a matter of fact, their
parts are interchangeable and can be mixed in any combination.
It's a little more difficult to make them than The Gears because they have beveled edges.
The Grenade and the Mace have hollow cubical
cavities inside, so to some extent they are Box Puzzles.
The spaces contain little secrets which makes
assembling more challenging.