The Makita 70-pound model HM1810 Breaker Hammer is powered by a 15-amp motor, delivering 1100 bpm and 63 joules of impact energy. The tool is equipped with the company's anti-vibration technology, a counterbalance system for three times less vibration. An automatic brush cutout system protects the commutator for longer tool life while a warning lamp indicates trouble with the 16.4-foot power cord. Makita USA Inc. 800-462-5482.