I've read about more commercial stick failures than grade8 bolt failures...the risk isn't just slipping either.Talking about safety, I’ve always wondered what would happen catching the step of a “safe” climbing stick just right after a slip and fall. Hopefully I never find out. The best thing that will increase your odds of returning home safely is to stay attached to the tree, period! Even then there is no guarantee of not getting hurt, possibly just mitigate damage.