This four-key set provides reliable access for elevator doors, service panels, and related components. Built for durability and broad compatibility, it supports quick, safe maintenance in daily operations. Key types - Elevator Release Key: for opening common door release mechanisms during service or emergencies. - Elevator / Emergency Door Key: compatible with a wide range of elevator brands and models for routine access or urgent entry; includes meter lock key functionality. - Triangle Key: fits precisely with valve keys and independent service keys used on elevator systems. - Elevator Door Emergency Key: extra-durable key for emergency door access. Material and build - High-strength steel, corrosion-resistant finish, designed for long service life; compact and easy to carry. Size and performance - Standard key size fits most panels and meters; robust construction resists wear and bending. Compatibility - Broad brand/model compatibility; reduces need for multiple separate keys in maintenance work. Use scenarios - Emergency release during a door fault to evacuate passengers. - Routine maintenance: open service panels and meters without damaging components. - Valve service: operate valve handles on elevator systems with the triangle key. What’s included - Four keys as listed.