1/2" AIR IMPACT WRENCH;TWIN HAMMER FRONT EXHAUST; MAX TORQUE:550FT-LB(746Nm) AIR PRESSURE:90PSI(6.3kg/CM2) FREE SPEED:8,000RPM AIR INLET:1/4";AIR CONS.:7.1cfm(200 l/min) WEIGHT:2.6KG;LENGTH:185MM **5 Steps adjustable power regulator. **The pneumatic motor with high effect designed, low consumption and high torque output. **Spherulitic iron cylinder with heat treatment and high hardness, durable and long lifespan, torque and output steadily. **High strength hammer mechanism **Two-piece construction for easy maintain