Fun, functional, and fascinating.
This solid brass Jack Puzzle is a paperweight, a desk object, and a distraction. The three-dimensional "jack" shape is formed by six notched brass bars, exactingly milled for precise fit, that interlock in only one specific way. Be warned. If you take it apart, it's a brainteaser to put back together.(Assembly directions included for the not so puzzle-inclined.) The Jack Puzzle weighs just over a pound.
Materials: Solid brass bull-nose bars, lathe-cut
Dimensions: 3" x 3" x 3", Bars - 1/2"diameter