MadBite Finger Saver Line Tightening ring For Braided Fishing line,Fluorocarbon Fishing line,Monofilament Fishing Line Corrosion resistant anodized aluminum construction for heavy duty cinching Rubber insert easily grips all types of fishing line especially braided fishing line and keeps it from slipping Great for knot tying, cinching and rigging braided line or monofilament and fluorocarbon Comes in both medium and large finger sizes and has greater surface area than other brands for superior, safer knot tying and rigging. Makes cinching down knots a breeze without damage to the fingers or hands