Features include... Minimum head height for close-quarter applications. Rear Exhaust Delivers the power needed coupled with the speed to get the job done. Composite housing, needle-bearing front head and full-cage gear design. Patented silencer - 85 dB (A). 4 CFM 400 max RPM 1/4" air inlet 1/4" Wrench 30 ft/lbs max torque