Estate item.  These two hangers, holders, ?, were from an estate with lots of antique and vintage iron pieces.  They are similarly styled to andirons and fireplace tools that were identified as wrought iron.  Could be used in a variety of ways.  Dimensions below approximate.  Happy to answer any questions.

Total width of hooks 10" 
Opening of hooks 1 1/4" - 2"
Mounting bracket 6" x 6"