I bought these strings for my Fender Jazz bass, as I wanted to see if these strings really offer more output and gain, as it is promised by the producer and in the reviews over the internet. Unfortunately, it was impossible to test this properly, as one of the strings broke immediately while winding it on the tuning peg. I tried putting a string from another producer, but I discovered that as it was stainless steel, it sounded very differently, so I had to throw away the whole new set of Ernie Ball strings. Given the expensive price it is very annoying that the quality control is simply not there.