That's really a pretty good deal, Jimmy.
Superfly (?) got his norton 4/8 cut in half by a masonry shop because the size was so unnecessary for him, but that set saves the trouble and you get more material for the price.
Besides, it pays to learn how to use thinner hones because all of the high end finishing stones don't come in a 3" width. Or if you do find them that big they are much more expensive.