Work fine

Using one so far and it works fine. All of them open and close properly. 

From sellers description:

Structure Improved Design-- Sturdy D shape body and screw gate lock hooks spring Link improved the structure to make it stronger and lighter. Multifunctional-- Can be connect to belt loops, handbag, backpacks, keychains, etc. You can also use them to put up tent light. Light But Strong-- Made of durable lightweight aluminum alloy, ultra light but strong. WARNING-- Can only be used for hanging light weight stuff. NOT applicable for climbing, swing, hammock, punching bag, big dog leash or heavy duty safety equipment, etc. Easy To Use-- It works smoothly as the spring-loaded gate makes it easy to connect items to a pack or belt

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https://www.amazon.com/Webetop-Aluminum-Keychain-Carabiner-Traveling/dp/B07GDD99LS