This buttonholer is an update of the older black version. It sold in the sixties and seventies and will fit most short shank machines. I love them as they make perfect uniform buttonholes every time and can be adjusted for width. This buttonholer even fits my Janome 6500. I use it to make butttonholes that are wider or longer than the Janome's built in buttonholer will make. The different cams will make regular buttonholes, keyhole buttonholes or even eyelets.