Bought two sets for my charango. Only needed to change one high e-string. It broke several times right after mounting it, that is several strings - several times. The first couple of times tuned at A=440, and later on at A=444 (of course the higher tuning didn't help in that matter). Thus these strings were totally useless to me, just a complete waste of my money and time. So now I bought the "Dogal D114 Charango Strings" and mounted this one string, and so far (couple of weeks in) it has not let me down.