I have been using Kyser capos for over 20 years now. Of all of the brands I have tried, this brand is my favorite. I have some that I have been using for over 20 years, so they are very durable. They are so easy to use and you can change position very quickly, which is nice when you are playing out. the one for the 12 string has a little more tension than the ones for 6 strings for the obvious reason that you have more strings to hold down. I would not recommend using it for a 6 string because it would be too much tension and that would not be good for keeping your guitar in tune, the frets or the strings. But it works great for the 12 string and there is no buzzing.