My sister gave me this block tool and I only used it once or twice because the cards were very awkward to read. The plastic peg in the lower right hand corner of the cards kept them stacked in a numerical order, but the cards had to be fanned out to read.
I have been going up the walls trying to figure out how to get this thing bound and finally I called Office Max and I got it spiral bound today. OMG, what a difference this makes. Now it will lay flat and I can refer to any of the cards with ease.
I'm sure some of you may have the same tool. Get it spiral bound and you will use it more often. Here are some pics of the cards.
before....notice the peg in the lower right card
spiral bound and lays flat