The Step "N Tilt Lawn Aerator is very effective at alleviating soil compaction problems. It"s patent pending design makes core aeration easy and enjoyable for do-it-yourselfers (DIYs) and professional landscapers. Simply step on the platform to insert aerator tines into the ground and tilt the handle bar back to remove the tines from the ground - it"s that effortless and easy!The Step "N Tilt Lawn Aerator is a true core aerator, not a spike aerator. Its aerator tines are hardened for extra durability. Four tines may be used in areas with strong grass root and soft soil for faster aeration. Two tines should be used in areas with bare spots and hard soil. Core aeration is a proven lawn aeration method and the only one recommended by lawn experts and university extension services worldwide. Its highly engineered hollow core aerator tines are very effective at extracting soil cores while creating 3.4" deep, 0.75" diameter holes in the ground. The replaceable and recyclable carbon steel aerator tines are case-hardened for extra durability. Includes a soil core removal tool. Also functions as a handtruck. We ship using USPS Priority Mail from Andover, Kansas, USA. Some assembly is required.