Made from reinforced plastics these versatile discs are strong, super light and very effective. The venting holes allows water to flow through the disc adding life to soft materials, but more important reduce the amount of energy need to lift it of the water, therefore making it an absolute joy to cast and fish. The Pro Softsonic disc is also great to lift wings and hackles, without damaging the delicate fibers. Turn it and you have a wobbler like action. Now that is versatility!