WHAT ARE THESE? ⤵️ This is a spike aeration tool. These metal tines create small holes in the ground to allow airflow, moisture, and nutrients drive down into the soil and root systems. They can help with compaction issues of smaller areas and create a less stress than core aeration. So which is better: Spike or Core Aeration? They both serve their own purpose. For the common homeowner, core aeration will be the way to go. Spike aeration is commonly used in summer, to alleviate dry spots, or for