I have the same one shown in the video, and it was sold as a pet trimmer, for around dog's faces. I have used it for years, but not the way the video demonstrates. It works better if you anchor the other end of the seam, either with a clamp or at the edge of a drawer, or just between your knees. I always start the rip out by taking out a few stitches with the regular seam ripper. The same tool is sold as a men's mustache trimmer, but they get a few dollars more for it when it's named that. It certainly looks the same. You have to apply a drop of oil on the blades occasionally, and sometimes it has to be cleaned because lint accumulates when you do as much ripping as I do.