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I also ordered a bunch of the Superior titanium coated topstitch sewing needles. According to Superior's website, the titanium coating makes the needle stay sharp longer and outlast any other topstitch needle on the market. Since I know I use my needles far past their prime (it's that thwap thwap noise that is the clue), I am looking forward to using these needles. Also, the Topstitch needle is recommended for all the kinds of stitching I do - piecing, applique, quilting. It has a larger eye and a deeper groove and a sharper point (which should stay sharper with the titanium coating, right?) Sometimes the threads I've used fray from being pulled back and forth through the machine, so I hope this prevents that from happening. These needles are supposed to be great with metallic threads also, but I don't use metallics very often. Maybe I will now.