Durable and dependable twin hammer clutch system for great durability and power. Double heat treated anvil for square drive shear resistance and high power durability. Durable steel clutch housing for long life in extreme conditions. Variable speed trigger allows speed control throughout the power range. Comfort grip handle for hand comfort even during long use. Patented Quiet Tech exhaust system makes for one of the quietest impacts in their class. Steel push button-one hand forward / reverse system for durable one hand operation. Efficient six vane air motor work great even when the air lines aren't. Variable speed regulator in forward and reverse for controlled tightening of fasteners. Lightweight composite housing for long days of use without the weight of an aluminum tool.