Brushless motor optimized for efficiency. Provides long run-time and longer tool life. Delivers 500 in -lbs of torque and 0-450/0-1,800 rpm for a wide range of drilling and fastening applications. Compact design provides ideal balance and control. Also ideal for overhead applications or work in tight spaces. All metal gear case and 1/2 in metal chuck provide maximum impact and shock durability. RedLink intelligence provides advanced overload protection against abusive applications and monitors the temperature to prevent damage and ensure maximum tool and battery life. RedLithium battery for more work per charge. Weighs only 3.7 lbs with battery. On board fuel gauge on battery. 6-7/8 in tool length.