The webb ls38 scarifier has 22 double tipped carbon steel blades these blades will gently but thoroughly rid your lawn of both damaging moss or thatch once you have completed the task the light air moisture and other vital nutrients will be able to penetrate your lawns root network this will result in a lush green growth and a healthier looking lawn the ls38 has a ball bearingwheels and a durable powder coated pressed steel chassis for rust resistence