Rockrok Lawn Aerator Shoes, Heavy Duty 2" Spike Sandals for Aerating Your Garden Yard Soil - 3 Adjustable Straps and Metal Buckles - 1 Size Fits All Stronger & More Vigorous Lawn: Rorkrok spiked aerator shoes uses solid spikes to perforate the soil with small holes to let air, water and nutrients penetrate the grass roots which promotes deeper root growth. More Safe & Stable Solution: three straps help aerator shoes get a better hold than spike shoes with two straps. No slippage as long as the straps are tight on your lawn aerator shoes. Heavy Duty Buckle Design: unlike flimsy plastic buckles, metal buckles will not break easily.And buckles with tiny teeth lock straps firmly in place. Free Size: fits into wide range of shoe sizes. Just adjust the straps for larger shoes. Easy And Economical Way: just walk on your lawn to aerate instead of renting a big heavy lawn machine especially if you just have a small yard.