As the industry leader, Kwikset has provided trusted security for over 60-years and has become synonymous with security, peace of mind, style and innovation. A clean, streamlined design on the Delta fits a wide range of decorating styles: from traditional and ranch to contemporary. Both knobs/levers can be locked or unlocked by a key on the outside or turn piece on the inside. The crisp, clean appearance of the Satin Nickel finish adds to the overall look of the product and brings a modern feel.Featuring SmartKey Security, which protects against advanced break-in techniques and allows you to re-key your lock yourself in secondsSmartKey Security re-key technology is compatible with Kwikset KW1 keywayFor use on exterior doors where keyed entry and security is neededComes with 2 keysANSI/BHMA grade 3 certifiedLocking mechanism functions with turn piece on the interior of the lockEasily installs in minutes with just a screwdriverLifetime mechanical and finish warrantyMicroban antimicrobial product protection keeps door hardware 99.9% cleaner than unprotected surfaces