These flexible ball fasteners are designed for use with tarps, covers and tarpaulins with sail rings. With the help of the elastic ball string, you can install the ropes without damaging them or the structure of the protective cover. With the help of ball strings, the tarp or tent cover can be attached and removed quickly and easily. The flexible loop of the ball fasteners is also suitable for bundling and fastening various equipment. Attach two Loops together to create a longer, double-ended loop. Thread the loop through the sail ring of the tarp, the ball will hold it in place. Attach the rope to the elastic loop. The balls, which glow green in the dark, are easy to find after dusk. Suitable for camping, boating and leisure use.