1. The extension hook provides incredible grip and professional loading. The rubber expander with a hook is an ideal accessory for awnings and garden tents. 2. The extension hook is made of a mixture of soft latex (elastic ring) and steel weight (hook). The durable, flexible, elastic, good - gripping, high - strength and reusable reliable rubber cord ensures maximum stability. The hook and the rubber are firmly connected and not easy to separate. 3. It is an excellent tool for outdoor camping and hiking. The length can be increased by tying a knot or connecting two hooks. 4. The rubber tensioner can be installed and removed in a few seconds, is easy to use, and is suitable for indoor and outdoor stage cloths, tarpaulins, posters, awnings, pavilions, trampolines, advertising banners and privacy nets.