Dosko Swivel Stump Grinder (337S-13HC)Dosko Swivel Stump Grinder (337S 13HC) Honda GX390 Power Swivel Action Grinding Head Greenteeth 700 Series Teeth The Dosko 337S 13HC Swivel Stump Grinder is built to make stump grinding easier, smoother, and more controlled. Its swivel action grinding head allows the cutter head to glide left and right across the stump, reducing operator effort and simplifying the grinding process. Just wheel the machine to the stump, engage the single lever wheel