Craighill Jack Puzzle has six notched brass bars that can only put together in a particular way. The Craighill Jack Puzzle can be used not only as an entertainment piece. But also as a masculine decor, or paperweight for your workstation. Moreover, the Puzzle weights only 1 pounds and created from the hands of skilled machinist in Massachusetts. Furthermore, maybe the brass bars look easy to solved, but you warned. The pieces are not so easy to get back them all together. The dimensions as assembled Puzzle is 3" x 3" x 3". To sum it up, this design can be impressive at first sight, let your friends and family try to solve it.