Not for the patience impaired, this is one of the more difficult puzzles to solve. The puzzles are hand made from 1/4" (some connecting pieces are 3/16") high-quality steel that is capable of withstanding all usual and common proper hand manipulation, as well as "creative" attempts to make the solution easier. Each Uncles Puzzle is shipped in an attractive three-color gift box with the solution. Launch date: May 1997.