Installation and removal is made easy with Poligon’s patented fabric tensioning system. Unlike other fabric shelters that use an unsightly galvanized turnbuckle and/or clumsy cable clamps in the hem system, Poligon makes it simple with a wrench operated telescoping eave system. Just slip the fabric’s D-ring and stainless steel cable over the tensioner’s hook (1), insert an Allen (or hex) wrench into access hole and twist to tension or loosen the top (2). It’s that easy! Poligon’s tensioner features all stainless steel hardware, screws, and nuts.