I had not seen these bolts on my prior trip, so they might be fairly new. I gravitate to the sight of these nice shiny things like animals to an oasis in the desert. Anyway, my Aztec safety line is the red rope, and our rappel line was attached to the other bolt. Friction from wrapping a couple of trees prevented the bolt from experiencing hardly any load. I DO realize that I'm a complete nerd for taking photos of my rigging.