Michigan Wheel's Vortex 4-Blade aluminum propellers are designed for quicker planing, improved handling and acceleration. Vortex 4-Blade aluminum propellers are a great alternative to a comparable 3-Blade propeller, offering enhanced performance when towing water skiers, tubers, knee and wakeboarders. They are recommended for the following applications: inflatables, aluminum consoles, walleye boats, offshore singles, pontoons, skiboats, and family cruisers.