Chuck, that not it This is made for photographers and seamless. It fits in your hand, and inside is a smaller circular outing of plastic was a tiny circular metal bladed that swoops across the seamless so you don't even have to push up and down soccors like, just glided across the seamless. (the tiny metal blade inside it was like what pizza cutter does except for seamless paper)
It was perfect, but now can't find anyone yet who has heard of it but me.