Upper Bounce Trampoline Deep Fastening Spiraled Anchor Kit (Set of 4) Just screw the steel anchor into the ground, connect the strap to the Loop on the anchor and to the trampoline frame, use the adjustable buckles Simple & Easy Attachment Keeps your trampoline safe in place while your kids are jumping Save your big investment with this small and ever-lasting investment Works only for trampoline frames with a maximum height of 34 inches