Look at this and imagine it is solid green. Imagine what it took for Lucy to remove all that green. I never use carabiners for their intended purpose, but I have collected a few. This one I used because I needed to keep Lucy locked up after the massive destruction she had done to my humble abode. This was an impediment to her freedom. While she could not break the carabiner, she found another way to escape. While I was frustrated at the time, I came to love her for her glorious determination. The full story is a classic, and it will be in my book.