Twisted Nail Puzzle _ Bundle of 12 Identical Puzzles Object is to separate the two twisted nails from each other. Not as easy as it may look. Bundle of 12 (twelve) IDENTICAL Twisted Nail Metal Brainteasers. Joining the two nails back together is also a puzzle. Tricky but fun. Once one gets the hang of it do it behind your back and amaze your friends.s Real carpenters shiny nails.