Leaky faucets beware as these Danco o-rings are here to help! Replacing the seals on the faucet stem will create a better seal and help prevent water leaks for the future. Faucets usually have one or more o-rings that prevent water from leaking around the spout. Stopping the leak saves both water and energy. This O-Ring Kit comes with a variety of the most used o-rings on the market. This kit is perfect for the professional plumber or an everyday DIY individual.