Yankee Ingenuity Tavern Puzzles Heavy Metal Disentanglement-Style Brain Teaser Old fashioned heavy metal brain teaser disentanglement puzzles. Objective of YANKEE INGENUITY is to remove the big 3" ring (indicated by the blue arrows). Replacing the Ring to the starting position is equally as challenging. Rated as a level 4 "Very Difficult / Very,Very Severe" (on a scale of 1 to 4). On this scale both level 3 and 4 are very challenging. Packaged in a cloth bag and with solution. Manufactured here in the U.S.A.