The 2900 Series is designed to last a long time, the vanes, hammer heads and shafts are designed for intensive use of the screwdriver in maintenance and industrial production. The 5-position power regulator helps to match the power to the application. Ingersoll Rand Twin Hammer Impulse Mechanism, Pressure Fed Mechanism Lubrication, Integrated Silencer Reduces Operator Fatigue. Power supply: lubricated compressed air - Recommended pressure 6.3 Bar