Material: this silver 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 timeMulti functions: the utility meter key has 4 shapes, including 2 square shapes (6 x 6 mm,8 x 8 mm),1 triangle (8 x 3 mm), and 1 key shape (6 mm) showed in the picture, it is functional and can be applied according to the size and shapeDimension: 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, please make sure it is compatible with your equipment before you buy itWide 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