These elastic ball fasteners are designed for use with tarps, covers, and shelters fitted with grommets. The elastic ball cord lets you secure your ropes without damaging them or the structure of your cover. With ball cords, setting up and taking down your tarp or tent shelter is quick and effortless. The stretchy loop on the ball fasteners is also handy for bundling and attaching various pieces of gear. Connect two loops together to create a longer, double-ended loop. Thread the loop through the tarp’s grommet, and the ball will hold it in place. Then attach your rope to the elastic loop. The balls glow green in the dark, making them easy to spot once dusk falls. Perfect for camping, boating, and leisure use.