These work.  They are easily attached to single layer of Coolaroo Shade Fabric&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/Coolaroo-Shade-Fabric-Extra-Heavy-90-UV-Block-Heritage-Green-6-by-15-Feet/dp/B000P7HS3U/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Coolaroo Shade Fabric Extra Heavy 90% UV Block, Heritage Green, 6 by 15 Feet</a>&nbsp;with a pair of pliers. Once attached, there is a quarter inch hole to attach lines, wire, bungee cords. They are made of tough, flexible plastic.