O-Hook Railing Pole for String LightsO Hook Railing Pole for String Lights Create a warm outdoor ambience with string lights for the holidays, outdoor dining, and parties withO Hook Railing Pole for String Lights For hanging string lights on a porch or deck, this wrought iron O Hook Railing Poles for string light easily attach to railings with C clamp style brackets. No tools or permanent hardware needed, the bracket is designed for handrails with flat sides and clears a curved top