I have not tried it yet, that is why I posed the question. I got it at a quilt shop while vacationing in Vermont. I had not seen it before. The owner and a customer were discussing it and showed my friend and I how it works. We decided to buy a package in case we "need" it for a project. We just didnot want to belong to the "Wish I hada bought that" club. LOL It was $11.99 It is 47" X 18". Have no clue when I will use it.