I saw a bunch of similar things in a basement carpark recently but didn't stop to get brand details. They were supported at the back and looked to bolt to the floor. Lots of leverage but the car park was full of flash cars so I supect they weren't cheap, one had a late model 911 underneath so the owner must be fairly confident (or he just has too mush money). If I can remember which building it was in I'll stop by and see if I can get some details. I do recall they only had a boom gate in use so I should be able to walk in to get the details.