This Stump Planer is designed for use with the Hex Auger Drives as well as the 24" and 28" Auger Extension Attachments. The 10" model is compatible with auger drive systems rated up to 2,000 ft-lb torque, while the 14" model is compatible with auger drive systems rated up to 3,300 ft-lb. Featuring three steel cutting plates and a cone-style cutting tooth, the planer bores into stumps and grinds them into fine wood shavings for easy cleanup. It is designed to cut below grade, reaching up to 18" deep for efficient removal.