Works on 6 string guitars so does a lot of cheaper capos under 200 Rs. I tune down my 12 string guitar a whole step down, placing the capo on 2nd fret. I get string buzz n have to adjust positioning to get clear tone. Doesn't work further up the neck as capo length is short n doesn't clamp all the 12 strings. Bought a cheap mustang capo for 6 string two years back n it still works as a charm. Dunlop FB84 not worth buying.