The Bestway pool surface skimmer 58233 provides a highly effective way of clearing debris from your above-ground swimming pools. The pool skimmer hooks over the inside wall of your above-ground pool and is easy to use. Simply attach it to your filter pump and it will start to gather debris automatically. Empty the skimmer when it gets full. The adjustable mounting bracket allows it to be moved up or down, so it's in line with the water's surface. Because the swimming pool skimmer is made of corrosion-proof plastic, it's durable and easy to maintain. Note: Pool and filter pump are not included. The product is only suitable for above-ground pools except for steel wall pools.