A pneumatic impact wrench with a 1/2" mounting square, it uses a new mechanism of two enlarged hammers. The wrench has an optimal tightening torque of 1100 Nm for various car repair, workshop works. It develops a unscrewing torque of 2230 Nm during unscrewing. It uses two hammers mechanism is powerful, strong and quickly loosens hardened, rusted screws, even in the most difficult conditions.The sealed housing with an oil bath lubricates the impact mechanism for less wear.The durable, fiberglass reinforced housing insulates the user's hand from the cold and reduces the vibration experienced. 6 blades rotor motor for faster release, more performance and more torque 3-level tightening selection and 1 level of loosening. This wrench has the best power-to-weight distribution at an affordable price.