The SP4012 series is a four wheeled self propelled stumpgrinder designed to deliver maximum cutting power in hard to reach areas. This unit is available with a variety of different engine options, and is equipped with a 533mm(21") diameter cutting disc that is 25.4mm(1")Blanchard ground thick. This compact machine had a width of 890mm (35"). The SP4012's heavy duty construction, such as flux-core weldments, hardened bushings and tapered roller bearings make it the most durable stump cutter available.