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.