Material: This black utility key designs with a cross shape, that is made of zinc alloy with good quality, it is sturdy and durable, you can apply it for a long lasting time. The outer layer of the key is sprayed with black paint, which can prevent rust and extend the service life of the key. Multi functions: The utility meter key has 4 shapes, including 2 square shapes, 1 triangle, and 1 key shape showed in the picture, it is functional and can be applied so long as according with the size and shape. Dimension: The 4-way utility key measures 6.5 x 6.5 x 1.2 cm, proper size for you to carry it hands or put it in your bag. Wide application: The multi-functional keys can serve as practical wrench, and turn the screws, suitable for many valves of electric, water, gas, train, cabinet, elevator and other valves, a wrench for multiple purposes, easy to receive. Warm Notice: This utility key is not suitable for some kind of radiator, please make sure its size is match your device before you buy.