Big Blue Spotting Scope mount

[Texanreloader]

Need some help. I can't find any info on this. I know it's for hanging a spotting scope, but have no idea how it works and what is that chrome rod w/rubber tips at each end do?
It has Big Blue on one side of the head and Creedmoor Sports on the other side. Went to the website and something close is listed but it's not the same. Figure somebody knows how it works.