usqvarna’s SG13 stump grinder is a well-balanced, maneuverable machine that provides commercial power and high productivity. The new cutting system provides sharper, faster cutting due to reduced weight and a unique tooth design. Cutting teeth are available for various soil conditions and feature three independent edges to effectively triple the use of the tooth. The teeth can be rotated in a matter of seconds using a 9/16’’ wrench. The machine’s stability, balance and adjustable handle allow you to grind objects up to 12″ below the ground while maintaining a comfortable and safe stance throughout the stump grinding job.