Buy Carabiners. If you break these - find the ones used for mountain climbing (they are designed to hold hundreds of pounds).

Here are some basic ones I doubt you can break:

https://www.amazon.com/sprookber-Stainless-Steel-Carabiner-Spring/dp/B08B5CYFN8/ref=sr\_1\_37?crid=QFGKMLQVJJ9Z&keywords=carabiner&qid=1673732471&sprefix=cara%2Caps%2C191&sr=8-37