Our round pool covers offer the ultimate protection and quality. 50 mph wind guarantee. They come with a center drain and enough sand or pea gravel tubes to go all the way around the cover. There are adjustable bungee straps attached to our covers every 5 feet for securing it to the ground or a wooden deck. Stakes are not included. If you live in a very windy area, I would suggest you install a screw in stake by every strap and secure every strap to the deck.