I think a never-gets-dull seam ripper is on every quilter's wish list along with never-ending bobbins. I really liked the Alex Anderson 4-in-1 model, it has a seam ripper on one end, a stiletto on the other, the caps for both are wooden and are shaped to be used as tools. It's square and easier to grip than those teeny rippers. Alas, it too has become dull.