This 660 Mobile Home single-cylinder deadbolt is operated by a key on the outside or a thumb turn inside. This is for use on exterior doors where keyed entry and security are needed. The Satin Chrome finish gives the product a modern and minimalist look. This deadbolt has Microban Antimicrobial product protection, which keeps door hardware 99.9% cleaner than unprotected surfaces. | Kwikset | | SmartKey Security Satin Chrome Metal Single Cylinder Deadbolt | Best Buy