Made of high-quality stainless steel; rustproof and durable. Can be hung on a keyring for easy portability. Convenient and practical; can be used to tighten screws. Works as long as the size and shape match the wrench. A universal cross wrench for opening electrical control cabinets, valves, and especially public doors and windows. This is a universal key for electrical control cabinets, elevators, and valves. It can be hung on a keyring, making it easy to carry. As long as the size and shape match the wrench, it can open electrical control cabinets, valves, and especially public doors and windows. Very practical. Features: Made of high-quality stainless steel, rustproof and durable. Can be hung on a keyring, easy to carry. Convenient and practical, can be used to tighten screws. Works as long as the size and shape match the wrench. A universal cross wrench for opening electrical control cabinets, valves, especially public doors and windows. Specification: Material: Stainless Steel Color: Silver Size: Approx. 7 x 7 cm / 2.8 x 2.8 inches Package List: 1 * Multifunctional Wrench Note: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures.