The PRO SOURCE front exhaust pneumatic impact wrench has a twin hammer mechanism to reduce vibrations for user comfort and a comfortable contoured pistol grip handle to reduce fatigue. Durable ergonomic construction and lightweight housing stand up to industrial applications. Delivers maximum torque for the most demanding tasks. Additional ease of use features: One handed forward/reverse switch and low 83 dB(A) noise level. Impacts per Minute: 1200; 1/2" bolt capacity; 1/4" inlet size; 3/8" minimum hose size; 600 ft/lbs maximum torque