Material: this silver utility key is designed with cross shape, made of good quality zinc alloy, sturdy and durable, you can apply it for a long time Multi-function: the utility meter key has 4 shapes, including 2 square shapes (6*6mm, 8*8mm), 1 triangle shape (8*3mm) and 1 key shape (8mm) shown in the picture, it is functional and can be applied as long as according to size and shape Dimension: 4 way utility key measures 7.2 x 7.2 x 1.3 cm/ 2.83 x 2, 83 x 0.51 inch, suitable size for you to carry it in your hand or put it in your bag, please make sure it is compatible with your equipment before you buy Wide application: multi-function wrenches can serve as a convenient wrench and turn screws, suitable for many electric valves, water, gas, train, cabinet, elevator , etc. Warm notice: This utility key is not suitable for one type of radiator, please make sure its size matches your device before purchasing