I received the Hanayama Cast Coil from Puzzle Master in Canada. This one is one of the newest in the Cast series. It is rated as Level 7 out of 10 (Challenging) by some and on Hanayama's own scale up to 6 it is rated as a 3. I personally agree with this rating. In all it took me about an hour to solve this and understand it (it could have been quicker but I got stuck having missed a move).

Just as with the others it is very well packaged with rudimentary instructions on the box and no solution is given (if you need one then find it here). This is a fairly small cube measuring 34x33x25mm but despite the size it is a surprisingly heavy weight. It consists of two pieces of metal folded into identical convoluted shapes (identical apart from a few little cut-outs) which are wound around each other to form the cube. It looks quite attractive but my only disappointment with it is that the finish is pretty tarnished to mimic an aged look - I would have preferred the lovely shiny look of the Cast Key II or Keyring. The aim, obviously, is to separate the two pieces and then put them back together again.