It appears that the only thing locking it is the gear drive. That's not good enough for me. Cool idea but I would want some kind of secure locking mechanism.
L8tr

6SALLY6,

LOOKS LIKE IT IS RIGHT UP YOUR ALLEY.  YOU ALWAYS LIKE CREATIVE THINGS.  THIS WOULD BE LIVING BEYOND THE EDGE OF DANGER.

Hornman wrote:

It's a double scissor jack with locking pins like the old style jack stands. Looks safe enough. The teeter totter is interesting. I would use an auxiliary screw jack to keep the vehicle where I wanted it. Looks like a poor man's two post lift. Good for wheel, brake, and suspension work. Be good for changing rear ends. Just unbolt the rear and tilt the back of the car up so you can roll the entire rear end assembly out, then roll the new one in.

My Boy Ron!!
 Good idea
 Would be pretty cool when changing rear. Un bolt and roll it out of the way!!
6s6
 

Well, the inventor came up with the design in 1994 and has been selling them from his factory in the Czech Republic since then. The original design was for 1500 kg. The lift has been upgraded to 3000 kg (6600 lbs). I don't think I would try to use it for my 6000 lb pickup, but for my 3000 lb Mustangs, sure. In fact, this lift looks perfect for my second garage. I'm going to look into buying one.