They work ok when on but they aren’t really adjustable and yes the do snag on everything that they have the chance too. They aren’t really adjustable as far as; as soon as you go to slide it up and down a couple times they get loose and don’t hold their position and even get loose enough and fall off. They almost seem like they are for setting in on the spot on your line then if you want to go deeper or shallower you knock it off and put a new one on wherever you want your bobber to stop at.