Heavy industrial equipment and machinery namely (1) an excavation bucket incorporating an impact actuator assembly namely a bucket body, an impact actuator and a tool holder adapted to receive interchangeable specialized tools and accessories and (2) a demolition breaker incorporating an impact actuator assembly namely an impact actuator and a tool holder adapted to receive interchangeable specialized tools and accessories allowing the breaker to be used as a regular demolition hammer and a percussion cutter, lever, compactor or ripper and (3) replacement parts thereof