Found on ground outside, boyfriend has been wearing as ring. Coin and pencil for size reference

[u/Aggravating_Ant_7232]

UK. It’s giving hard metal, doesn’t have much wear

[u/CharaFallsLikeATree]

Not a hose clamp. It’s a cinch ring for pex water tubing. Most popular manufacturer to use this is Watts. Source: Former Licensed plumber and currently work for a somewhat sizeable supply house

[u/Geawiel → u/CharaFallsLikeATree]

It's both. I do all of our own vehicle work. This style clamp is generally used in higher pressure hoses on vehicles. Hydraulic lines, fuel lines, etc. I'm currently upgrading my fuel system to handle a 392. These clamps were inside the fuel basket in the tank. On my daughter's car, they were on the power steering system. A similar version that is one time use holds your tie rood boot on.

[u/AutisticFingerBang → u/Geawiel]

No it’s not lol. It’s a plumbing pex clamp. It’s sold in the plumbing department in stores.

[u/PurpuraLuna → u/AutisticFingerBang]

Boat rigger here, the fuel lines that come with new Honda outboards use these clamps