The Powerbuilt Xtra Low Profile Jack, from Alltrade Tools, slips under bodies as low as 2-3/4” but rises all the way up to 15-1/2”. Rated for vehicles up to 4,000 lbs, this jack features the patent-pending locking safety bar that holds the load without the need for jack stands. It is the perfect jack for sub-compact, compact and modified cars; and for trucks, unibodies, and body-on-frames.