1. The main key is made of zinc alloy, which has good stability, corrosion resistance and rust prevention performance, and is strong and durable. 2. The surface of the cross multi-functional key is electroplated to improve wear resistance and corrosion resistance, making it smoother and more beautiful. 3. It contains 4 types of tool keys, including 2 squares of different sizes, 1 triangle and 1 full - square knob of a different size. 4. The cross wrench is small in size and light in weight, easy to carry, and can start work anytime and anywhere. This product is equipped with a double - ended screwdriver, which can help complete the work faster. 5. The zinc alloy cross key is suitable for many water and electricity meters, radiators, gas meters, elevators and control cabinets on the market. Please make sure the size matches the equipment before purchasing. 6. Are you still worried about suddenly losing the keys to your gas meter, water meter and heating key? What if you need to open relevant equipment during work but can't find the key? This four - in - one universal key can solve your problems and is suitable for some electric meters, gas meters, control cabinets and elevators on the market. 7. - Name: Four - way multi - functional key - Material: Zinc alloy - Process: Surface electrolytic silver plating - Weight: 83 grams 8. - 1 four - in - one multi - functional wrench - 1 screwdriver 9. This product is suitable for many relevant equipment on the market. For equipment of special sizes, please confirm whether the size matches before purchasing. If you have any questions or suggestions about this product, you can contact us by email, and we will try to reply to you as soon as possible within 24 hours. Thank you for your attention.