3 large, heavy-duty cork-screw anchors twist into the ground. A sturdy strap secures to each anchor and attaches to the frame of the trampoline. When properly installed, the trampoline will be divided into 3 equal sections to evenly distribute the tension and safely secure your trampoline and enclosure (if installed) to the ground. Helps prevent strong winds from moving/flipping your trampoline. The anchor kit fits perfectly for both 8ft and 10ft size trampolines.