Set of 2 self-made tuna rings. Inner diameter sizes and standards: Approx. 24-25cm, approx. 300 grams, 1 piece (for 30kg class tuna) Approx. 27-28cm, approx. 530 grams, 1 piece (for 50kg class tuna) Since they are handmade, the circles are slightly distorted. Made of solid stainless steel round bar, they have a higher specific gravity and reach the tuna faster than commercially available products. And because they are made of stainless steel 304, they are rust-resistant. One-touch types often have their joints come undone, so this endless type has a lower chance of coming off. To prevent damage to the leader from burrs or snags, the inside is polished as finely as possible and finished with compound. The outside is a bit rough, but there are no problems with use. They are very sturdy; you can't spread them open by hand. If you don't mind a slightly imperfect shape, or if you're dissatisfied with commercially available rings that are slow to reach the fish or have poor hooking, please give these a try. I also do yellowfin tuna float fishing, so I made these extra because I wanted them. Please feel free to use them if you'd like. No claims and no returns, please.