The F-Series, direct-drive, walk-behind power trowels from Arrow-Master has a lower center of gravity that provides for less wobble and side torque. Direct drive provides for more power to the blades. A fully enclosed spider assembly protects the blade arm and pitch-control components, allowing for faster clean-up. Available in 30-, 36-, and 46-inch diameters, with a range of engines and horsepower ratings. A heavy-duty gear case is standard.