Because I am an authority on "unsewing", i am qualified to recommend the very best seam rippers. My Bernina slips through those stitches like butter...most everytime I turn my sewing machine on, I get to use it. The other ripper that I really like is Alex Anderson's 4 in one tool. It is a big wooden thing that has a pokey, seam ripper, wooden presser and something else. They feel the same when I am using them so they may be manufactured the same company. Remember I am a total expert on this subject. :)