This breaker hammer is designed to strike like an air hammer, but with less noise and vibration. It has a powerful 15 AMP motor that delivers a full 53.9 ft.lbs. (73.8 Joules) impact energy. This model is a kit and also includes a hammer cart, as well as two 1-1/8" x 20-1/2 patte bits (1-1/8" Hex) and two 16" self-sharpening bull point bits (1-1/8) " hex).