These 8" ball bungees are a great way to secure space blankets, tarps, and shade panels to crates, x-pens, and tents. They are designed to stay on the tarp or shade panel (attached through the grommets) once you put them on. The concept is simple, the ball rests against the grommet on the tarp, a loop wraps around the pipe of your tent frame (or anything else you want to secure it to) and loops over the ball. The elastic nature of ball bungees hold them securely in place. Ball bungees are sold individually.