Application and technical features of open spanner screw is the main fastener in mechanical equipment, open spanner is an important tool for machining, production and maintenance in the mechanical industry, the project is a revolution of traditional spanner tools, it has the following advantages. 1. It can work fast, three to four times faster than the traditional boarder, and even faster than the current fast boarder. 2. An open plate hand can be applied to 2-6 kinds of screws, while a double-headed rigid hand can only be applied to 2 kinds of screws. An open plate hand is equivalent to 2-3 rigid hands and is equivalent to a movable plate hand, but it can work quickly without adjusting the opening. 3. Long service life, not bad, and the front fast board easy to break. 4. The manufacturing process is simple and the cost is lower than that of mechanical hand. 5. Light weight, easy to carry, easy to work.