These heavy-duty corkscrew anchors simply twist into the ground. A sturdy strap is attached to each anchor & secures to the frame of the trampoline to the ground. Once correctly installed, the trampoline will be divided into equal sections to evenly distribute the tension & safely secure your trampoline & enclosure (if installed) to the ground. Designed to help prevent strong winds from moving/flipping your trampoline. The anchor kit fits perfectly for 6ft to 10ft size trampolines.