That impact socket is 5.7 inches, weighs almost 60 lbs, and is probably used on steel beams. That ain't a home socket wrench socket.
1 1/2 inch is the drive size, I did not catch that first time around .
It is for a bolt with a 14.5 cm (5.7 inch) head.
Socket weights 36.7 lbs according to Amazon.
Amazon sells it for CDN$ 1,823.89
The bolts used on the steel frame construction of the auto factory I worked at, did not have bolt heads that big.
Maybe some of the stamping machines that stamped the steel panels did.