Troy Bilt Super Bronco 16" 208cc Counter Rotating Rear Tine Tiller. Cast-Iron Encased Bronze Gear Transmission: Provides top of the line ruggedness and durability. Patented 10" Bolo Tines: Made of high-quality carbon steel for strength and durability. The long curve cuts into hard-packed surfaces and digs deep, the offset angle turns the soil from beneath the surface and breaks it into manageable chunks and swept. Counter-Rotating Tines: Move in the opposite direction of the wheels, allowing the tiller to dig faster and deeper into hard-packed soil and to work especially well in challenging conditions. Power Reverse: Helps back out of tight areas more easily.