Brass Jack PuzzleThe Jack Puzzle is composed of six different notched brass bars that interlock in one specific way to create a unified "jack" shape. Precisely milled, and weighing just over one pound, it can serve as a desk object, a paperweight, or a true distraction but be warned, if you take it apart, you might not be able to figure out how to put it back together. Solid Cartridge Brass puzzle Unified jack shape 1 2 diameter bar Bull nose ends, lathe cut