the tickets are able to be used but are perforated so that parts of each ticket is severed. perforation are such that you do not get a full ticket but instead part of the left side of the ticket is missing but just short of the number.
I have bought these rolls for the last 10 years. I think they are good but they are so difficult to tear we have to fold them in order for them to stay in line otherwise they are very just won't tear properly.