I have a regular Harbor Freight hydraulic 3-ton jack that has twin pistons unlike my old Craftsman which looked near identical with 1 piston and a 3-1/2 ton rating.
3-ton jack stands at a minimum, sometimes I wish they were bigger for some reason. Skip the Harbor Freight stands for now and buy some ACDelco or Pro-Lift stands. I miss the ones with the pin.
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You can get the ACDelco stands at O'Reilly's and the latter at Walmart. HF has redesigned their floor jacks, this would be closest to what we use. Have fun!
Now that I look at the pics, those Pro-Lifts have a pin, in a different place, but still better than one IMO, I'd get those, heck, I might go buy some of those to replace my other ones! I need something to lift the Sierra anyway!