Black Diamond director of quality, Kolin Powick, has written a great article on carabiners; it talks about rock climbing crabs vs industrial crabs and why they don't recommend using one type for the other activity. He also carried out some tests on 'workhorse' crabs vs lightweight crabs using a drop tower. It's interesting to see that the lightweight crabs actually tended to deform and become unusable, whereas in the same tests the heavy duty crabs remained usable.
Image from Black Diamond
