Below is just the product description, but it explains everything:

Unclogs drains in seconds; Environmentally safe; Non-toxic; No harsh acids, additives or lye’s. No CFCs – Contains no CFCs which deplete the ozone layer. Works on: Sinks; Toilets, Bathtubs; Garbage Disposals, Floor Drains, Shower Stalls. Simple; No more plunger. CLR Power Plumber Pressurized Drain Opener with a fresh lemon scent clears clogged or sluggish drains in seconds without the use of harsh chemicals, acids or lye. CLR Power Plumber is safe to use on all sound plumbing and works on almost any clog including hair, grease, and soap build-up. Use monthly to keep pipes free flowing and to prevent obstructions! Included in Kit: Extension handle for toilets and urinals; Power plunger; Plastic cap; 2-way universal adapter.

Seriously, this thing takes only a few seconds to use! And once you’ve used it, you’ll more than likely toss out your old plunger. I recently had a backed-up toilet (that’s always fun) and used almost every drain opener out there. None of them budged the water level an inch, even left overnight and a day, and with the use of a plunger.

Even those this item is a little pricey (around $20), it it so worth it! You get 15 plunges/applications, which will probably last you a year. And who can beat a full money-back guarantee if you’re not satisfied? :)