I had the same thing happen as Paul P did, with the scratching. I asked BD and they said they've noticed that too, but it's just the contrast of the paint. Other than that, these biners are fantastic. They are huge enough to be used as long-term toprope biners (on anchor draws) because there's so much metal that it'll never wear out (well not never, but... not for a really long time). I use one on my ATC for rappelling too for the same reason. Also, the hugeness disperses heat really well on fast rappels. The only downside is that they won't fit through a link at the middle of a chain, so if you have them on your daisy chains your options will be a bit limited. For any other purpose, you'd be a fool to buy anything else.
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