The MK-APC/W Air Powered Walk Behind Concrete Saw has a 9.5 hp pneumatic motor with gear box drive. The rugged tubular steel design provides a rigid base from which the pneumatic motor is fixed to the blade guard. Designed for tough cutting jobs, this saw is ideal for joint widening, indoor floor sawing, trenching and patch work. The MK-APC/W will cut up to 7 inches deep with no gas or engine fumes.