I bought a package of them when they were on sale a few months ago on Amazon. The only time I use them is when I'm doing my binding. They hold the binding in place really nice. The other thing I like is not getting stuck with straight pins when I grab my quilt to move it around. I do like to put at least 15-20 on my binding at a time because I don't want to keep moving the clips. I keep the container right next to me and just toss them in as I pull them off the quilt. I've never used it during any other process in quilting. I bought another package recently when Hancock had all of their notions 50% off. If you can get them on sale or use a coupon, buy them at a good price.