Vehicle mounted vice

I've always wanted to mount a Vice to the various vehicles I've owned/used but either never got round to it, never had a suitable place for it or never intended to keep the vehicle long enough to bother.

Well as I'm hopefully going to keep my new truck for quite a few years I decided to finally get around to putting one on it. It took a while to find somewhere suitable to put it, needed to be at the right height but not get in the way with a solid fixing.

This is what I came up with

Pictures are fairly self explanatory, basically one tube fits inside the other with a wing nut type bolt to secure it in place, and then when not in use the whole thing gets twisted 90 degrees and slides in out of the way.