Solid steel motor and arbor housing provide maximum durability. Powerful 1 1/3 hp motor produces high, efficient performance. Patented stainless steel motor controller is maintenance- and adjustment-free. Heavy-duty, double-row ball bearings assure long life and smooth operation. Exclusive grit-rejection system keeps motor and bearings clean for extended life. Built-in mist lubricator automatically oils motor when throttle is activated.