Channel Post Adapter for U-Channel Sign Post.
If you use 3lb. sign post, it is my reccomendation
that you buy the 3lb.- 4lb. Chuck. The reason
being, I have had customers whose 3lb. sign post
won't fit in the 2lb.-3lb. Chuck. This will work
for 2lb. sign post as well. See options for Chuck
Adapter for 2lb. sign post.