The Janome Button Shank Plate was originally designed to be used when sewing on buttons where a larger thread shank is needed especially for Jackets and Coats. However, it has become increasingly popular as an aid to overcoming the problems of thick seams such as those found on Denim Jeans. Most sewers have experienced the problem of thick seams either when dressmaking or doing home furnishings. When you come toa thick seam you either end up with a run of tiny stitches where you sew over the 'hump' or you try pulling your fabric through and risk breaking needles.