The 3-D Jack Puzzle Looks a Lot Easier than It Actually Is

The Jack Puzzle is comprised of six different notched brass bars that interlock in one specific way. When you solve it, it creates a unified “jack” shape. Precision milled by a skilled machinist in Massachusetts, it weighs one pound—so when you finally figure it out, use it as paperweight on your desk or a handy distraction from the work you should be doing.