We bought a double cylinder Arlington handset for our French front door in 2007. Living in Florida and near the ocean are hard on metals with salt air punishing even the hardest metals. About every three years, the handsets began to show signs of corrosion. Called Kwikset with the original sales receipt information and they replaced the complete set, including new lock cylinders, without question. Have had to do that three times, each time sending them a photo and receiving new complete sets. Polished brass may not be the best choice for salt air but they look darned nice on our doors. Moreover, we are most impressed with the quality of Kwikset products as well as their standing behind the product.
Lifetime guarantee. They really do mean it!