Firstly let me say that these work very well - they give me the extra inch of waist on trousers that are a little tight and the buttons are just the right size at 20mm for the cargo trousers and army greens I wanted them for.
However, on the negative side... two things... they aren't exactly like the ones in the picture - the brassy coloured one is the same (or very similar) but the other type are silver versions of that i.e. WITH the pattern and not shiny silver un-patterned as shown. The second thing is that I am pretty sure that these are NOT brass as the advert for them implies - they are plastic. As I said they work well but the pic needs updating and the advert wording changed.