This lawn aerator shoes are made of safe materials. Sturdy and durable to use. Features of fine and smooth workmanship, so that you can use it trustingly. Can be worn while mowing the lawns. The shoe assembly is very convenient. Features -Color:Light Grey -Material:PP, Galvanized iron -Size:31.00X14.00X9.30cm/12.18X5.50X3.65in - The material is safe and durable, which is wear resistance and practical for the long time use. - Aerate your lawn while you mow, trim or walk around your lawn. Provide your lawn with the air, water, and nutrients it needs. - Just by ventilating on the lawn instead of renting a large heavy lawn machine. - The shoes suitable for lawns, gardens, courtyards, terraces, and also for the construction industry. - Easily straps onto your normal shoes or boots. Creates small holes in the soil to provide grass root with nutrients. Packing list1 x Pair of Lawn Aerator Shoes22 x Screw22 x Nut22 x Spacer1 x Wrench