Keep your trampoline from becoming a flying object in strong winds with these Insaga heavy-duty ground anchors! Each 18-inch anchor features 3-inch wide spirals that really grip the soil, plus they come with secure chain links for attaching to your trampoline or other equipment. Made from solid 12mm diameter steel with chrome plating to resist rust and corrosion, these things are built to last. The sharp point makes installation easy - you can use a power drill with a 14mm socket or just twist them in manually. They're perfect not just for trampolines, but also for camping tents, canopies, carports, sheds, and swing sets. The package includes 4 anchors with chains, which is typically enough to secure most trampolines. At 17.5 inches total length with 15 inches going into the ground, they provide serious holding power. No more worrying about your expensive trampoline taking off in a storm or strong wind - these anchors will keep it firmly planted right where it belongs. Definitely one of those 'why didn't I get these sooner' purchases for any trampoline owner!