In the Fall 2010 Keepsake Quilting catalog, page 117, they show some new acrylic rulers with a "diamond-powdered-encrusted edge" that's supposed to sharpen your cutter as you use it. Then, onpage 122, they show 2 different types of blade sharpeners. I have the one mentioned before that has the sanpaper discs and I'm not thrilled with it. Either I waited too long to try to sharpen my blade, or it just doesn't work the way I had hoped it would. (Now I know why it was on clearance - LOL) I don't know if the other ones in the catalog are any better, but I'm leary now. Think I'll just replace them with ones from Harbor Freight.