Keeping your trampoline tied down to the ground is a great way to ensure years of use with the JUMPKING Anchor Kit. Hold down in tornado and high wind storms. The sturdy spiral design screws into the ground for extra security. Easy to assemble with 4 anchors and 4 tie-downs. This kit can be used with round or rectangular trampolines. Features . Compatible with round and rectangular trampolines. Constructed with galvanized steel. Recommended for any area that may experience occasional high-speed wind