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 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 7.2 x 7.2 x 1.3 cm/ 2.83 x 2.83 x 0.51 inches, 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, etc. 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 Make sure this fits by entering your model number.