Review by: skinner, 2007-09-15
Have a full set which have been used exclusively in limestone. Maybe it has something to do with the softer rock, but even after only being subject to body weight in an aid situation, I've found that they can be extremely difficult to remove. That being said, I always carry them on my rack, and when I need a bomber placement in a small crack, I pop in a ball nut. Unlike standard wired nuts, they stay put when subject to excessive movement , upward rope pull, etc.