This mechanical keyless entry door lock provides secure access without batteries, wiring, or apps. Its double-sided keypad supports 4-7 digit codes and allows direct code changes from the handle and keypad. The zinc alloy body with a rust-resistant coating is built for dependable indoor or outdoor use. It fits a range of standard door thicknesses and supports both left-hand and right-hand door installation. Passage mode and auto-locking help make everyday access more convenient.