These strings produce a tone with a lot of overtones, especially when playing hammer-ons the strings produce very high overtones, like you would hit a small piece of steel, but the overtones are not unharmonious. Very useful for playing hammer-ons. They lasted 2 to 3 weeks until they sounded to dull for me and the high e-string stretched endless at the ballend when abused with a kahler vibrato system. Tuning stability is otherwise great! Divebombs and bends are no problem.