Very solid, well built, feels a little heavy.
I ordered this extension to use with my Manfrotto Table Tripod 709B but I was disappointed when I couldn't make it work.
This extension is actually designed to work with the 209 table tripod, that has a removable head.
The head of the 709B can't be removed (without disassembling the whole tripod).
It seems there is no way to extend my 709B tripod.