Just bought these over the holidays on sale to complement the 2-1/4 ton Craftsman hydraulic jack that was also on sale. They seem sturdy enough and should be a good replacement for my old jack stands that were starting to get rusty around the fringes. I don't anticipate having any problems with these but if I do, I'll amend my review.
Had these jackstands for 3 years, they were really flexible and flimsy. Shouldn't have trusted them, luckily I wasn't under the car when the weld broke on one of them and it partialy collapsed.