MowAerator, Tractor Wheel Aeration Device, Consists Of 2 Sets Of Wheel Braces That Attach To A Riding Mower's Rear Wheels, Equipped With 1.5" Long Metal Spikes, Made From .125" Cold-Rolled Steel, Quick & Easy Installation, Mow & Aerate Simultaneously, Environmentally-Friendly Design, Powder Coated To Prevent Rusting, No Assembly Required, 1 Year Limited Warranty.