I don't know why you guys are putting down the scissor jacks. I like them. They're not as good as a couple others that I've used, but I would feel a lot safer with a scissor jack rather than a pole jack.

I had a bad experience with a pole jack on a bumper of a Ford van... I was jacking it up, something didn't feel right, so I stepped back away to assess the situation and make observations. The van was tilting slightly and it looked like the bumper/pole jack was not holding it's ground. I was about to aproach the van to lower it when the jack suddenly gave way with a huge crash. The van dropped to the ground and the jack came flying off the bumper in a forwards/upwards direction. It flew past me about 2.5 feet off my left side at some horiffic speed. A few feet to my left and I would have been impaled in the chest.

I've also had a racheting horizontal scissor jack slip a few teeth when jacking up my Pontiac 6000. About all that I trust confidently these days are the scissor jacks with a worm screw and a hook of some sort that goes above and below the lift point. My floor jack does nicely, but the wheels on it cause undesired movement if I'm working on my slightly inclined driveway.

God bless, and chock your wheels before you lift your car.
Fitz Fitzgerald.
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'87 Blue 245, NA 225K