This is much more than just a force deck. The possibilities with having these are endless. You can make your own force deck, have duplicate cards for transposition effects, etc. My advice is to also look into a Roughing Stick, available here at Penguin, if you are looking to make some of your own creations!!!

Using one way force decks, have many applications. It adds to many of the tricks that I perform. Letting someone shuffle the cards and picking a card at random then revealing their selected card is mind blowing.

I have several one way force decks because there are killer effects that can be accomplished with one. The flaws are that the deck is not inpectable, but is that really a flaw? (Sceptics and heckelers arent a magicians audience, its entertainment, so if you have that person harassing you to see, just say no, and/or pack up your stuff and go) The second issue is why I have several of these, you cant get away with more than one trick, two if your showmanship is of a professional quality. Based on the impact behind the effects possible I highly recommend any oneway force deck.

Great for forces but also really good for making gaffed cards with (especially Torn and Rrestored effects) or just using as duplicate cards in effects. You can also make you're own svengali decks using a one way force deck if you want to.

I would recommend getting at least one of these decks to put in your magic box because I find they always come in handy.