Because of its oval shape, it always accepts force with double lines on both ends of the ring, so it is stronger than a round ring that is prone to load on one line of the ring (twice as our company). The spring performance of Hercules material has excellent resistance to fatigue and tear, and the ring gap opens even when the large hook is attached. Prevents rings from coming back and pinching lines. The oval shape also separates the body and the hook to reduce action errors and improve the hook rate.