Fortunately, or unfortunately, however you look at it, the blades are heavily oiled -- thus they have a tendency to stick together -- so please don't be hard on yourself if you happen to get two blades instead of one -- the blades are hard to separate. Rotary cutters aren't the only things that get put together wrong. I obtained a 201-2 Singer sewing machine -- it had been brought to a place for repair -- the SM Mechanic apparently didn't know what he was doing either, because he couldn't tell that the tensioner was put back on the machine backwards. My son took one look at the User's Manual and at the machine -- and saw that it was backwards -- a 201-2 for free, except the foot control was gone as well as the slide plate, but those were relatively inexpensive. Ladies, give yourself credit for being human beings -- none of us are perfect and I've put my rotary cutter back together wrong before too!