Compliant with ADA Standards, the Master Lock No. 1676MKADA Built-In Combination Lock series is designed to fit almost all locker styles and features three ways to open with a student key, master key and combination for use like other combination locks in your system. These locks are designed for special needs students without looking different. As the ADA version for the 1670 series, these locks have five different pre-set combinations for a longer, useful life in your facility.