This tub grinder is powered by a 300HP CAT 3306 Diesel engine and only has approx. 1,705 hours of use. It has swinging hammers & a magnetic head pulley on the discharge conveyor. This grinder can process up to 120 cubic yards per hour of wood waste such as pallets, brush, demolition debris, bark, yard waste, and more. GREAT BUY!! Call today!