These capos work well, and are easy to attach, via a ratchet mechanism - you just put the capo on your guitar neck, squeeze, and it the ratchet works to fix it firmly. The reason I don't give it more stars, is that it can be a bit fiddly to remove, the ratchet, not operating in reverse, obviously, means that taking it off is quite a clumsy operation. Still, not expensive and they do the job.