Polished. The parts that touch the line have been smoothly polished. When removing the vest from the fish, etc., it rubs frequently, so if it's not polished, the line will gradually be cut. ＜Specs＞ Polished Material: SUS316 Total Length: 4.5cm Thickness: 2mm Recommended Dyneema Line Thickness: 1.6～2mm Weight: 3g The Daruma hook is 2mm thick. It's durable and has minimal resistance. Using 2mm diameter Dyneema line is the best size and won't slip out easily. #anzyproduct's list of 2mm diameter Dyneema ↑Click to see my Dyneema listings