Flexible Flyer 30117 Ground Anchor Kit for Metal Frame Swing Sets Anchor kit provides swing/gym set stability for four-legged metal play sets Set includes four auger ground anchors, attachment hardware, and installation directions Multiple attachment holes allow anchors to secure to a variety of metal play sets Compatible with all Flexible Flyer steel swing sets (sold separately) Designed for children from two to 10 years old; 180-day limited warranty