The bolts are all high tensile 8.8 rated.
Have an equaliser strap that I plan on using should (when) i get stuck, also have more steel & looked at making new brackets so the hooks can be mounted at a better angle that is less likely to dig in. These are really just temporary until I can get a winch bar and winch, just have a hand winch till then. Best way to learn how to not get stuck is to recover yourself with one of those I reckon