These rotary cutters are designed for medium-duty applications such as weeds, grass, and brush up to 2? diameter. These cutters are designed to work with 32 to 90 hp tractors, and are available in 60? and 72? widths.A shear bolt through the input shaft or a slip clutch, if equipped, protects the gearbox and driveline from damage. Front and rear chain discharge shields are optional.