I have bought the best seam ripper at Atlanta Thread. They have 2 sizes and the little one is great for undoing quilt block seams. Unfortunately--it looks like Atlanta Thread is no more. I went to their site yesterday to look at some guttermann
thread and it seems they are now together with another company. From what I have seen on the website, it looks like the other company took over. What a bummer. I bought bunches of stuff from them.