1/4” AIR IMPACT SCREWDRIVER RP-7225 Air impact Screwdriver, Durable aluminum housing. High torque removes tight screws easily Quick-chuck uses 1/4" (6.4mm) hex bits. Rear exhaust, Suitable for screws 3.0mm max. Model: RP-7225 Square Drive : 1/4" Free Speed : 11000RPM Working Torque : 33Ft-Lb(45N.m) Air Intel : 1/4"NPT Avg. Air Consumption : 2.6cfm (74 1/min) Air Hose : 1/4"ID Net Weight : 1.83Lbs(0.76Kgs) Capacity Bolt size : 3-5MM Overall Length : 6.90"(176mm) Sug. Air. Comp : 2HP Packing : 20Pcs