corner barstool sitter
If they 'bend' laterally, they aren't all that stable. I won't use those things except as a last resort. Never in the driveway, when I've got something like four floor jacks in excellent condition and an older light-duty one that's in maybe "fair" condition that I'd still put more trust in for changing a tire than some of the screw jacks I've seen.almost every car sold comes with a SCREW type jack which aside from the very small base, can not (well, short of metal fatigue) physically collapse.
One jack, one corner at a time works just fine. No different from changing a flat . . .just get one of those car-flipper devices - put the car on it's roof and you can change wheels at a comfortable height and zero risk of it falling on you. Might leave a mark on the roof, but i'll buff out.