Features: Material: Plastic, Metal, Nylon. Accessories: 4 adjustable straps with strong and secure buckles; 26 durable metal spikes; a small wrench; a simple instruction manual. Belt length: 80 cm and 75 cm. Pro Lawn Aerator Sandals: Lawn aerator shoes contradict the aeration of the soil; low cost can maintain a good lawn, but also save energy and protect the healthy environment. Complete Manual Aerator Shoe: This manual lawn aerator contains 4 adjustable straps with strong and secure buckles, 26 pics and a small wrench. The different holes on the bottom plate allow you to adjust the tightness. Eco-Friendly Soil Aeration: This pair of lawn aerator sandals makes your garden lawn healthier, allowing the air in the soil to circulate at high speed, keeping moisture absorbed and ensuring greater nutrient supply to the lawn. Easy to Assemble and Use: Simply put it on, adjust the straps, click the buckles and you are on your way to a greener and healthier lawn. Comes with an instruction