The Tangled Nails are actually two regular nails bent and entangled together. The object is to just find a way to separate them. As an added challenge, try to entangle them back again, which can be even harder. This simple and yet fascinating design uses two identical pieces and the solution is based on a beautiful symmetry. The Tangled Nails are from our own PuzzleMaster brand and come packaged in a Clam Shell.