Broad Arrow Marked Bar

[The Bedford Boys]

Hi Everyone,

Purchased a metal bar at a local 2nd hand shop. It's roughly 4ft 7in long, straight, is of octangonal section and has the following markings stamped into it:

-Broad arrow in a circle on two sides of the bar.
-Sheffield Made In England
- <MM> Toledo Cast Steel

Does anyone know what it's for?

Cheers.

Here's a horrible picture of it.. Need a new camera.