Self-propelled SP4012 Series provides smooth and precise grinding of tree stumps, even in hard-to-reach areas. Equipped with 4 wheels, hydraulic steering, and dual-speed ground system that eases on-site travel. Measures 35 ins. widenarrow enough to fit through standard yard gates. Cutting wheel measures 1 in. thick by 21 ins. in dia. Overall weight is 1,550 lbs. Select from a variety of engine options, including 27-hp. Kohler or 29-hp. diesel engine.