Hyindoor Lawn Aerator Tool, Manual Metal Tool Set with 16 Solid Steel Spikes, Automatic Leaf and Dirt Cleaning with Spring Base Design, Garden Tool for Yard Care（with Gloves）

Solid build, easy assembly. I used Loc-Tite blue on the spike threads to prevent loosening over time. The trick is in the technique to use it. It took me a while to refine it, and after I got the hang of it, I was super happy with what I could do that otherwise would be prohibitively difficult or expensive. 1) if possible, work downhill in forward moving rows 2) wait until the day after a soaking rain 3) stepping forward with the arch of your foot over the center of the aerator, land firmly on the aerator, stand on it and rock the handlebar forward while bouncing slightly. 4) rock back , then rock forward with a little bounce for deeper penetration. 5) pull it out, place it forward at your chosen interval and repeat. 6) dont get too concerned with cleaning out the black plug tines. Don't clean out the plug tines until the soil is super super compacted inside, and none is popping out the top. If the soil is moist, it'll slowly work its way out the top. I cleared the tines about every 20 digs. To clear, hold tool at base, where handle and arched pipe meet and with other hand, push tool in from the top enough to let go of it while you lightly pound it in with the palm of you hand.