1)Application, The tool is pneumatic wrench with the characteristics of large power, high efficiency,various application. It is widely suitable for installing the moyorcycle,cars, generator. It is also very useful for car mending factory,tire shop, garage,workshop and so on. 2)Features, All the parts are processed by precious machine tool. The dimension of process face is very precious. All the material of impact structure is high quality steel, the heat treatment system extend the service life, so it can stand large impact and wearing. The tool with the ingenious structure, which make the operater feel comfortable and reduce the tire sense largely.