padlock hanayama cast metal brain teaser puzzle _ level 5 difficulty rating deluxe games and puzzles padlock cast metal puzzle from hanayama puzzles of japan is both a delightful and tricky brain teaser puzzle. it consists of four pieces and looks like a regular padlock. the object is to separate all pieces. the second puzzle is to replace/ re-assemble back together. measures approximately 1.6 inches tall and .75 inches thick. this is a really fascinating disentanglement brainteaser. <p> recommended for ages 12 to 105 years. a few bright children between 8 to 11 years may also enjoy, provided they understand that no force is used to solve. forcing pieces may damage the puzzle !! </p> <p>bonus red velveteen drawstring storage pouch. measures approximately 3 x 4 inches laying flat. </p> <p> rated by the manufacturer as a level 5 difficulty (on a scale of 1 to 6 where 6 is the most challenging.) difficulty level shown on the packaging. your own experience could vary substantially. padlock is part of a series of 60 plus very interesting and mentally provocative metal brain teasers from the hanayama puzzle company of japan. some serious puzzlers refer to these as "disentanglement-style puzzles" as they involve taking something apart and then re-assembling. re-assembly can also be a puzzle and may be equally as tricky. </p> <p>no this puzzle cannot be used as a normal padlock. bad idea.</p> <p>reminder. no force is ever required to solve the puzzle. just a series of clever moves. </p>