Rear axle U bolt plate/mount and U bolts from a Dodge Ram.
This was removed many years ago, so we do not know what model or year it came from.
The plate is marked with a number 457.
Measuring inside hole to inside hole, I get 3.5 inches and 2.5 inches. So it would fit a rear axle with large tubes at 3.5 inches. Would fit a 2.5 inch wide leaf spring. U bolts are 11 inches long.
Good used condition. Very clean.