The HDX605 riding trowel features twin 46-in. rotors that can spin up to 160 rpm. It is powered by a 57-hp gasoline engine with a 13-gallon fuel tank. Joystick controls allow for quick adjustments and high maneuverability when working around obstructions, and a cruise control function makes it well suited for finishing large areas of concrete. Allen Engineering; www.alleneng.com