These guys are must have for anyone with a lot of hair like me. I don't even know how I did it but I managed to clog not the tub (that's normal) but the sink drain! I hate using chemicals because they have such an awful smell and they can hurt you if it gets on your skin splashing back. I don't have to worry about that with these and I don't have to wait all night for it to work. Just slide it in, jiggle it a bit back and forth, and out pops the problem! Love how many I get in this set and it's a very affordable alternative to having to rebuy expensive chemicals and deal with the process of using them. Great product!