This is typically used for a pool winter cover that has metal holes in it approximately 4 feet apart. You are purchasing a new Cable 100 foot long and 3 winches 100CW Heavy-Duty for securing a cover once you feed through each hole around your above ground swimming pool or other appropriate tarp. This will work with the following above ground swimming pools. 12 foot, 15 foot, 20 foot, 25 foot and 30 foot round or rectangular pools. It has plenty of length. Just make sure the cover you are using has ring holes in it. That's where this fits in. ***The cable is heavy-duty and tough! ***This can be used for any tarp that has metal ring holes on it.***