Designed off the Arlec Gutter hooks, I ran out and wanted more so quickly drew up some to print. I also ran into a problem on windy nights the Christmas lights would fly out of the hooks, so I designed a stopper to be pressed into where the lights sit to keep them in place. I printed mine out of PETG but PLA might be more flexible for the occasion as mine were not flexing very well. Best results might be TPU