Lawn Aerator Shoes, Mospro Spikes Aerator Sandals Heavy Duty Spiked Shoes Each One With 3 Zinc Alloy Metal Buckles and 3 Straps for Aerating Your Lawn or Yard Adjustable straps with zinc-alloy metal buckles which is corrosion protection (6 total), unlike other lawn aerator sandals which have flimsy plastic buckles. Each nut is equipped with a GASKET. It's an innovation design and different from other stores. Just in order to secure it tightly. Universal fit goes over most any size shoe or boot, up to 11-3/4" long. Simply adjust the straps for larger shoes. No need for bulky and expensive lawn equipment. Revitalize your yard simply by wearing these spiked shoes and walking your lawn at any time you like. Convenient and economical way to aerate your lawn---penetrate the soil to let water, air, and fertilizer deep into the roots of the grass.