The Simplex Unican L1000-1 digital combination lock provides fully mechanical pushbutton access control with no electrical wiring, electronics, or batteries. Exterior access is by combination. Egress is by interior lever and is free at all times. The lock meets Americans with Disabilities Act (ADA) standards. L1000 Series locksets are ideal for limiting access to high-traffic, security-sensitive areas in commercial, institutional, residential, and industrial buildings. These locks are perfect for locations with a high personnel turnover rate such as data processing centers, employee entrances, RandD labs, apartments, dormitories, and restricted areas in hospitals and airports. Heavy Duty - Ansi 156.2 Grade 1. 3 Hour UL/ULC Fire Rating (""A"" Label Doors)