Details Double-hole Design: The double-hole turnbuckle base can be fixed with two screws at the same time, which can make it more firmly fixed on the handrail. Round Edges: The edges of the product have been polished smoothly, which can further protect you from accidental scratches. Application The cable railing kit is suitable for outdoor and indoor cable railing systems, such as stairs and staircase cable railing, deck railing and garden fence, horizontal, vertical and straight cable guardrail.