The KEYMAN EN 12209 Grade 3 mortise lock is engineered for high-frequency public use, certified CE and fire-rated per EN 1634. It features a galvanized steel case and 304 stainless steel bolts, ensuring 200,000-cycle durability. Non-handed design enables easy installation on wood or metal doors. With robust construction and reliable performance, it is ideal for commercial buildings like schools, hospitals, and shopping malls.