Ideal for high performance in continuous heavy duty applications Brushless motor Variable speed controlled by trigger Forward and reverrse rotation Electronic 4 stage impact power selection Auto-stop system and trigger switch with full speed mode Driving shank 34″ square (C-Ring) Standard bolt M12 to M36, high strength bolt M10 to M27 Impact power selection maxhardmedsoft Maximum tightening torque 1,800 Nm, nut busting torque 2,050 Nm, Weight: 2.20462262 pounds, Manufacturer: Makita