I can not say if the quality is mediocre, but when I started to use it it did not work as well as I expected. It is necessary to watch the temperature of its iron when it is welded, because the pin will have quickly to move if one insists too much. In fact, I planned to use them to connect "Premium Jumper Yarn" yarns (these colorful tablecloths that are often sold next to raspberry), and I find that they do not fit together very well ... I do not know which of the two incriminate, in any case, they do not work very well together ...
