The multi-functional key wrench is an essential tool for elevator maintenance personnel with a triangular design for easy operation of internal triangle screws and bolts, providing a firm grip and precise control. It also integrates tools such as screwdrivers and keyring accessories for ergonomics and reduced fatigue. Suitable for adjusting control panels, changing key switches and routine maintenance to improve work efficiency and simplify tasks, durable and versatile, it is the ideal choice in the technician's toolkit to ensure smooth operation of elevator systems.