King Kutter Gear-Driven Reverse Tine Rotary Tiller - 72in.W, Model# RTG-72 72in. working width provides wide coverage Heavy-duty, reinforced metal frame with cast iron gearbox for exceptional durability 6 tines per flange use reverse rotation for efficient performance that requires less time in the field Tines perform at working depths up to 8in. Heavy-duty rotor bar and flanges stand up to punishing conditions