Those come in several varieties ranging from cheap chromed dress up ones with thin tubing and 1/8" sides,to ones made by Smittybuilt and other good name brands that were very rugged...
I had one of unknown origin on my 75 K5 (it was 2WD!) and it was a rugged one,the tubes were thick as schedule 40 pipe and it had 3/8 flat stock for the sides..it weighed enough to sag the front end down a good inch when I installed it..it had light tabs and hooks on the sides too...