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:
Amazon.com: Torin 6 Ton (12,000 LBs) Capacity Double Locking Steel Jack Stands, 2 Pack, Black, AT46002AB : Everything Else
Amazon.com: Torin 6 Ton (12,000 LBs) Capacity Double Locking Steel Jack Stands, 2 Pack, Black, AT46002AB : Everything Elsewww.amazon.com
or smaller/lighter version:
Amazon.com: Torin AT43002AB Steel Jack Stands: Double Locking, 3 Ton (6,000 lb) Capacity, Black, 1 Pair: Automotive
Buy Torin AT43002AB Steel Jack Stands: Double Locking, 3 Ton (6, 000 lb) Capacity, Black, 1 Pair: Jack Stands - Amazon.com ✓ FREE DELIVERY possible on eligible purchaseswww.amazon.com
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.