The material: this silver utility key has a cross-shaped design and is made of high-quality zinc alloy, sturdy and durable for long-term use. Multi-function: the utility meter key features 4 shapes, including 2 square, 1 triangular, and 1 button shape as shown in the picture. It is functional and can be used according to size and shape compatibility. Dimensions: the 4-way utility key measures 7.2 x 7.2 x 1.3 cm / 2.83 x 2.83 x 0.51 inches, offering a compact size that is easy to carry and fits conveniently in your pocket. Wide application: this multi-functional tool can serve as a convenient wrench and screw-turning device, suitable for various applications such as electric meters, water valves, gas valves, train valves, cabinet locks, elevators, and more. Note: this key is not suitable for radiator systems. Before purchasing, please confirm that the size matches your device requirements.