yeah, I switched mine out to grade 8s years ago after stripping on of the bolts. It's holding and not slipping, hitting on it with a 12 lb sledge. May jump up to a 20 pounder.
Geez! Best I can ever get in there is an "engineers hammer". Even a cross pien smithing hammer is hard to swing under the car. Even so the stricking surface of the t-bar remover is dented a bit.
