Protect Your Investment! Secures your Trampoline to the ground! 4 large, heavy-duty "cork-screws" twist into the ground each connected to a sturdy strap attaching to the frame of the trampoline. Helps prevent strong winds from moving your trampoline. Increases safety and peace of mind! 4 large, heavy-duty "cork-screws" twist into the ground. A sturdy strap secures to each cork-screw and attaches to the frame of the trampoline. When properly installed, the trampoline will be divided into 4 equal sections to evenly distribute the tension and safely secure your trampoline and enclosure to the ground. Helps prevent strong winds from moving/flipping