re: Harbor freight clamps and clamps in general

All of my quick grip clamps are Irwin, from 4" up to 36" in multiples, and have never had a problem. I bought 6 clamps from Harbor Freight of the quick grip type awhile back and had 100 percent failure rate, 3 of them the first time I used them. I also bought 5 small c clamps at HF and they seem to be ok.