Lord & Hodge grommets are mil-spec, which defines them rather well.  They closely approximate Stimpson grommets which are the gold standard (and which I used professionally for 4 decades).  Conversely, the General equivalent is made in India, apparently as a cost-cutting measure.  The two [General] boxes that I sampled were only 71% of the weight of their Stimpson equivalents, denoting thinner stock.  Two grommet washers were cracked, and one of the male parts was so greatly deformed that it couldn't be used.  Another crumpled on being set.  My results aren't conclusive since two boxes makes for a small sampling, but since they were bought several months apart [from different stores], the results are indicative.  Stick to Osbourne, Lord & Hodge, and Stimpson.  Avoid all off-shored sources!