Craighill™ jack puzzle

From key rings to bottle openers, every piece is thoughtfully designed to look great and function exceptionally well. The Jack puzzle is comprised of six different notched brass bars that interlock in one specific way to create a unified "jack" shape. It is exactingly milled by a skilled machinist, and weighs just over one pound. A desk object, a paperweight and a true distraction—but be forewarned, if you take it apart, you might not be able to figure out how to put it back together... (Hand-drawn assembly instructions are included).