I've had these fretwraps for about a year, and can confidently say that they dampen string sounds on whatever part you need dampened. I have used them to get rid of unwanted "'jangles" on headstocks and Bigsby style tremolos, and also used them on the fretboard to dampen open strings. So far, they've worked everywhere I've tried to use them. This small size fits all of my 6-string guitars, both electric and acoustic (steel string).