I've been considering one, very unique. My question is I have a Renzetti Master vise and the clamp for the stem is different. Not sure it will work on the granite, and I do not want to modify my vise. The clamping design that Renzetti uses is very sturdy, it actually tightens as a clamp instead of just screwing into the stem. I will email them and discuss what can be done, enjoy yours.