Metal Puzzle Game: Excellent Brain Teaser and Interesting IQ Set for Kids and Adults Worried that the rings might bend and break? They are made of thick and durable stainless material which keep the puzzles shapes intact that you will be able to to use it for years. Can't figure out how to solve each brainteaser? Instructions are provided along with a picture diagram. It will show you how the pieces are actually suppose to go and they work like magic! Perfect size toys with individual piece measuring 9. 1 x 9. 1 x 1. 4 inches which is large enough to work with that youngsters and even grownups can handle. 100% premium quality teaser that sets it apart from the rest so you will never have to test and buy another one again. Tough enough to challenge everyones minds. These logic tests can help anyone practice focus and great for pastime since the fun never stops when you finally put the pieces apart! So what are you waiting for? Add to cart now!