Adjustable Size: The 11.5* 5 inch Aerator Shoes fit for women's shoe size 6-10, men's shoe size 6-9, with 3 adjustable Velcro straps wrapped around your heel and attach with hook-and-loop fasteners, no slipping and loosing. Never Broken Shoes Base: Design with using 2 Base of ALUMINUM ALLOY and PLASTIC SOLES to ensure sturdy, durable, and comfortable, instead of other's only with plastic or metal soles. Never Bend of Spikes: Heavy Duty Spikes add oxygen, water and nutrients to soil easily. The yield strength reaches 675Mpa which is sturdy enough, suitable for any hard soil, rocks, or slopes. Fully Assembled: No Installation Required. No prep is required so all you have to do is slip them on and walk around. Aerate your garden like a pro. Upgrade the colorful lawn aerator shoes to provide you with more options. (Notes: Before you "take a walk", you could water the lawn fully. ) Healthy and Economical Way: Aerator spike shoes provide more economical choices for garden patio grass lawn golf course, a pair of shoes with spikes on the bottom and make the grass look better by just walking around, instead of an aerator machine rental. Lawn Aerator Shoes