We can tell you from experience, pay close attention to this puzzle as you take it apart!  This puzzle is comprised of six different notched brass bars that interlock in one specific way to create a unified "jack" shape.  It's exactingly milled by a skilled machinist in Wisconsin, and it weighs one pound. It can be displayed on your desk, used as a paperweight or as a way to challenge your friends and colleagues. 

(Hand-drawn assembly instructions are included in the package; although you don't need to show those to your friends...)


  • 1/2" Diameter bar
  • Weighs approx. 1 lb
  • Measures 3" X 3" X 3" (assembled) 
  • Solid Cartridge Brass (alloy 260 – 70% copper, 30% zinc)
  • Bull-nose ends, lathe-cut


  • Made in Wisconsin