If you don't already have one of these, I highly recommend that you get one. I have had mine for years and I tend to take it for granted; using it only as a simple bench vise. That changed yesterday simply because we bought a new TV and a DVD/Video Cassette Recorder.
In the way of explanation - the VCR would not work and I had to spend some time relearning up the system. To do this, I took an old, old VCR off the shelf to use. I chose an old demo tape so that if I screwed up nothing would be lost. The demo tape just happened to be one for a Zyliss Vise. Now the attached video is not the same one. In fact, I believe the old one is a much better sales pitch than what is now on the web.
To make this long story short, I ended up watching that entire demo and decided that I needed to share.
Here is what I found online for the Zyliss.
https://www.youtube.com/watch?v=LiGY1DCyjXY
If you get one, I guarantee that you will not be disappointed HOWEVER beware. There is more than one imitation out there. I can not declare one any better than the other but I do like my Zyliss.