Aerating your yard with Brinly’s 40″ Transport Tow-Behind Spike Aerator is easy! The 132 sharp tine tips perforates the soil over 2″ deep so seed, fertilizer, and water reach your lawn’s root system. The Brinly durable, heavy-duty spike aerators comes with 11 stars in Galvanized steel, and Brinlys patent-pending 3D star design has been tested to improve star strength by 2X, ensuring durability even in compacted soil. The solid steel tine shaft, extra-wide steel tow bar, and heavy-duty nylon spacers add even more strength, ensuring you get a green, healthy lawn year after year. Each 8″ diameter star rotates independently and continues revolving during tractor turns ensuring no area goes without aeration. A fully enclosed, 14 gauge steel, 150 lb. capacity weight tray provides a stable platform for additional weight, maximizing penetration in hard soil. The Brinly SAT-401BH-A comes standard with transport wheels – perfect when crossing driveways, sidewalks, gravel paths, etc. Simply reach behind you and pull the lever to engage the wheels instead of the tines.