The 10B7011 Heavy Duty Anchor Bag is designed to anchor a soccer goal on any surface. Simply add sand to the 10B7011 Heavy Duty Anchor Bag, and place it on the base frame of the goal. The key is to place the 10B7011 Heavy Duty Anchor Bag in the back corners, where it can provide the most counter-balance. One key feature of the Heavy Duty Anchor Bag is the space between the handle and the bag, allowing the net to be clipped into the frame of the goal without losing the safety of the bag. To find out the proper amount of Heavy Duty Anchor Bags needed to anchor your goal, please contact your goals manufacturer. Kwik Goal recommends 6 of the 10B7011 Heavy Duty Anchor Bags for one full-size Kwik Goal.