Features: Materials: plastic, metal, nylon. Accessories: 4 adjustable straps with strong and secure buckles; 26 durable metal picks; a small key; simple instructions (english not guaranteed). Belt length: 80 cm and 75 cm. Pro lawn aerator sandals: the contradictory lawn aerator shoes soil aeration; 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 secure strong buckles, 26 photos and a small key. Different holes in 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 air into the soil from circular to high speed, keeping moisture absorbed and ensuring greater nutrient supply to the lawn. Easy to assemble and use: just put it on, adjust the straps, click on the loops and you're on your way to a greener, healthier lawn. Comes with an instruction manual with pictures. Tips: Take care of manual lawn aerators, wipe clean after use, to keep the product intact, prolong its life.