I've looked almost everywhere for these push button clasps that I believe are made in Japan. Stuller has a pinch clasp ..but these have a little rod that you knot to on one end and the clasp is on the other. The rod inserts in the clasp and locks and a little button on the side of the clasp releases it. Anyone know where to find these or who manufactures them? Be great for people with difficulty using the more fiddly clasps. Any help greatly appreciated.