Swimerz Stainless Steel Fishing Line Springs, Size 2, 10cmL, 1.4mmID, 2.0mmOD multiple compartments they have double stitched seams

they have double stitched seams and are tear resistant

fly and small lure fishing

and can also be used to tune hard body lures

and a soft knock rattle that creates a single cadence sound to attract fish

particularly for bluefin tuna

Swimerz Stainless Steel Fishing Line Springs, Size 2, 10cmL, 1.4mmID, 2.0mmOD multiple compartments they have double stitched seamsSwimerz stainless steel springs slide over monofilament line or rigging wire to provide abrasion protection. Hooks, swivels and shackles will then glide smoothly on the spring material, protecting the leader. Available in 5 diameters, they are 100mm long. Designed for big game sport fishing rigs they work well with mono filament leader sizes up to 2. 00mm line diameter.