I found this article very informative, it's good to know that I won't have to replace them very often since I went with some high end double locking carabiners.
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8 Reasons It's Time To Retire Your Carabiners - WeighMyRack
Carabiners are incredibly strong. They can last a lifetime when properly maintained. We list the 8 main reasons to retire your carabiners.
blog.weighmyrack.com
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