Our most popular standalone pushbutton cylindrical lock delivers unmatched durability and convenience for both indoor and outdoor applications. Built with Grade 1 strength, a rugged clutch mechanism, and a vandal-proof all-metal keypad, this electronic digital lock offers multi-level user access with up to 15 programmable codes. Installation is quick, about an hour, and retrofits existing cylindrical knobsets with minimal prep. Powered by (5) AA batteries, it features key override compatibility with major interchangeable cores, easy passage mode, and visual/audible entry indicators. Weatherproof WP models ensure reliable performance from +151°F to -31°F, making it ideal for any environment.