Does both flat and slightly curved fretboards, and does it well.
My local music store recommended it to me, and it was a little out of my small budget, but I went with it and I'm satisfied with it. Feels super high quality, just like Ernie Ball products feel. It's made of light but tough aluminum and the parts that contact the guitar are padded with a squishy rubber so it doesn't crush your lovely guitar neck. The words "CURVED" and "FLAT" are marked on the two sides of the capo to help differentiate the two options. I don't know if this is a problem with everyone else's axis capo, but my one makes a kinda squeaky noise when you open it. It is easier to hear when you open it fastly but who does that. But it's such a minor thing and such a tiny noise so who really cares. Fantastic capo!