The Works toilet bowl cleaner is tough on stains. Its disinfecting formula removes rust, lime and hard water build-up. The Works toilet bowl cleaner cleans what you can see as well as what you can't. It cleans and disinfects killing germs such as Salmonella and E-coli. The Works toilet bowl cleaner is safe on plumbing and septic tanks. It is also available in a thick formulation with dynamic clinging action. Watch the stains disappear. The Works toilet bowl cleaner is quick, easy to use and priced at a value to save you time and money.