Looks like they're just butted rings, so you're relying on the rididity of each ring to resist opening up. Welded or rivited rings would be much more robust. E

Looks like they're just butted rings, so you're relying on the rididity of each ring to resist opening up. Welded or rivited rings would be much more robust. Especially vs piercing weapons, like arrows or fighting knives. But much more expensive.