3 Pieces Cross Wrench Material: Each set contains 3 high-quality cross-shaped zinc alloy keys, which are electroplated and will never rust, durable and can be used for a long time. Anyone who deals with control cabinets needs this. As shown in the picture, there are 4 ammeter key shapes, 2 square, 1 triangle and 1 key shape. They are fully functional and can be used according to size and shape. Suitable for air conditioners, electric cars, cars, elevators, etc. Size: As shown in the picture, it is suitable for you to carry with you or put in your bag. There is a hole in the middle of the key, which can be hung on a key ring for easy carrying. Wide range of uses: The multi-functional key can be used as a practical key and to turn screws, suitable for many electric valves, water, gas, trains, cabinets, elevators, etc.