Both hooks are incredibly strong. I have towed my old autocrossing benz with the straps hooked just to those loops hours and miles on end. Just looking at them you would not think they are very strong.

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.