High quality material: The universal key is made of high quality zinc alloy, offering good stability, anti-corrosion, anti-rust properties, high strength, and durability. Electroplating process: The surface of the multifunctional cross key is electroplated to improve wear resistance, corrosion resistance, and provides a smoother and more attractive finish. 4-way multifunction: Includes 4 instrument keys—2 square keys in different sizes, 1 triangle key, and 1 solid square key. Easy to carry: The cross key is compact and lightweight, convenient to carry, and can be used anytime and anywhere. The product includes a two-way screwdriver for faster operation. Wide range of applications: The zinc alloy cross key is suitable for most water meters, heaters, gas meters, elevators, control cabinets, and similar equipment. Please confirm the size matches your equipment before purchasing.