As it stands, this trick is over priced for the American version. Only one of the tools provided will work to perform the effect. Most magicians will know how to compensate for the empty slot in the case, but there is no explanation in the DVD for alternatives, except for 1 that is very time consuming. One of the tools is absolutely useless for performing the stage presentation. American keys differ from European keys in more ways than appearance. That being said, there is endless potential for this effect because the key, itself is amazing. I've created 2 alternate versions already and I love it. There should be an updated DVD provided for the American version. Until that happens, only buy this effect if you are an experienced magician.