Does the job when you don't want a Kyser or some other big lever and spring capo getting in the way.  The levers of the other more popular capos get in the way sometimes when moving them to the higher frets.  This one you can set and forget.  It is inexpensive and small enough to carry in your pocket.  A good spare in case you run in to a situation where you might want one, but did not bring your main gear... Get two: one for your pocket and one for your case.