I have the 3 ton red Torin with the lockin pin. I used them in the rear with ramps in front to do my oil, trans and diff oil changes. They are pretty solid. Order 2 sets from amazon, and if the welds are really shotty then exchange the bad ones. Homedepot has some Husky ones with a pin that looked decent in store.What do you think about these with pins:
https://www.amazon.com/Torin-AT4600...sed-search-10&pf_rd_t=BROWSE&pf_rd_i=15708041
or smaller/lighter version:
https://www.amazon.com/Torin-AT4300...sed-search-10&pf_rd_t=BROWSE&pf_rd_i=15708041
Harbor freight also has some aluminum 3 ton jack stands, and what I've noticed is they are cast in 1 piece, so no welding joints. This might be a good alternative, but they are more expensive.