Now I have already used some snaps and I realize that, unfortunately, go now and then snaps off when clicking broken. If the snaps are made new off they are very difficult to open, so that you are afraid about the materials must, where it's your turn - after a few weeks of frequent use will change this. Open (yet) too easily - I am afraid, however, that they must be let up after a very long time and exchanged again and again
