[rokndad]

Also a very BIG ISSUE for these two post lifts. No matter what the thickness of your garage slab, make sure it is not a two-way post-tensioned slab. If it is, you are highly advised not to drill anchor holes in them or as an option, you may have a non-destructive x-ray company come out and spot the hole locations for you prior to drilling. Drilling without checking first in these slabs may cause a tendon in the slab to fail, posing a potential safety risk for whatever structure is on top of the slab....meaning your garage or house.

However, where they mark safe areas to drill, may not be in the exact place you wanted to place the lift. One more thing to check off on your list prior to buying.