Size: 7.2 x 7.2 x 1.3cm. Material: Made of good quality zinc alloy. Sturdy and durable. 4 shapes: 2 square, 1 triangle and 1 key. Shown. Multiple Functions: Multifunction keys can be used as a key. convenient and turn screws, suitable for many solenoid valves, water, gas, train, etc. the closet, the elevator, etc. Mobile phone: the key; the crossover has a weight of 56 g and there is a hole in the middle of the key. cross, can be hung on the key ring for easy transport