It certainly does look like one of those annoying bosses with extra-long legs that you’d either shoot straight through or would block every shot thanks to the lack of a third dimension.
This is, in fact, called a lifter and it’s used to put together and take apart all-terrain cranes (truck mounted cranes).
For certain projects it may not be possible or cost-effective to drive the all-terrain crane as one piece due to weight restrictions some roads. Instead they transport it in pieces and use this thing to put it together on site.
Here’s a video showing how it works… which is to say very, very slowly.