Daiichi Seiko Co., Ltd. Tightening ring
■Inner diameter: 22mm
■Ring-shaped hard rubber: 2 pieces
■Coil rope: 2 pieces
■King's seal
● Put the ring on your finger, wrap the line around the ring and tighten. When tightening a knot or tightening a PE line and leader, the line does not dig into your fingers directly, allowing you to tighten even thick lines as you wish without hurting your fingers. The coil rope can be attached to a bag or vest and extends up to 50cm.