1" Air Impact Wrench, Super Duty, 2750 ft-lb Torque, Titanium Hammercase, Thru-hole Retainer, D-Handle Inside Trigger. With a titanium hammer case, bronze end plates and torque up to 2750 ft-lbs, the 3900 Series are the premier industrial grade impacts in the industry. Power: High torque output of 2750 ft-lbs and 800 blows per minute. Bronze End Plates: Thanks to the bronze end-plate and a corrosion preventative treatment, this tool is corrosion and wear resistant, which makes it great for outdoor conditions. Durability: With a titanium hammer case and metal housing, this tool can withstand even the harshest conditions. Balance: Twin hammer mechanism ensure consistent power and balance. Reverse bias motor to help remove the most stubborn bolts. Pressure-fed mechanism lubrication ensures complete coverage throughout the tool. Integral muffler. Optimized for general industrial use, MRO, rail, heavy machinery, and shipbuilding.