Unlike other products, Leaf Exterminator's ribbed cover encourages airflow to lift debris off with a gentle breeze. Leaf Exterminator is made of durable aluminum, which won't chip, crack, fade, or rust. The system is fully enclosed, preventing nuisance wildlife from nesting. Leaf Exterminator is attached to both the front and back of the gutter for added support. With Leaf Exterminator, your roof is not penetrated and the shingles are not disturbed. The ultra low-profile design makes the product unnoticeable from the ground.