Connecting the tippet and leaders through the ring will allow you to change the tippet as often as you wish without shortening the leader. These larger 40#/3mm rings are easier to thread than 2mm rings and will accomodate larger sizes of tippet/line, also great in the construction of Euro Nymphing style sighters. No longer will you need to replace leaders when switching from large streamers to a # 16 dry-fly, just cut off the 2X, tie on some 5X with an Improved Clinch Knot, attach fly, and go fish. Tippet rings are incredibly strong and very light. When attached to your leader, they'll float, or they'll follow the leader down if your're using a sinking leader or a fluorocarbon tippet. 10 rings per pkg.