If it's the bias binding makers, I have them in different sizes and I find that I can do it better with out using them. I tend to iron the edges whacky and I end up burning my fingers. Is it for the bind on your quilts. If so, why not just do the binding where you fold the fabric in half, sew it on and turn to the other side, hand stich and done. If you can't hand stitch, you could sew the binding to the back and turn it towards the front and machine stitch.
If it's for applique, I can't help you there. I don't applique yet.