Very cool! I was at a quilt show a few years back and watched a woman demonstrate a Wahl seam ripper. Wahl is the same company that makes hair clippers. Anyway, the ripper worked like a charm and then she said that she had gone through two of them. If they were so reliable why would it be necessary to replace it? Anyway, I bought one and have had it for over five years and it works like a dream for most projects. It is too large for small areas, but if you have to take out a long seam then it does the job super quick.