The ultimate quick change guitar capo!  When you are up on stage and have to switch where your guitar is capoed or if your guitar is capoed at all (just snap this on your headstock) this is the capo for you.  All you need is one hand to swiftly move the capo.  The best way I can describe how it works is like a clothespin or chip bag clip only much more durable and shouldn't harm your guitar.