These Heavy-Duty Gear Driven Tillers are designed and manufactured for many years of dependable use. Designed to work with 20 to 65 hp tractors, they are available in 48?, 60?, 72?, and 84? widths. With a gear-drive transmission and six tines per flange you can till down 8? deep. A slip clutch protects the gearboxes and driveline from damage.