hey guys, I have a CNC machine and have been thinking lately of getting a vise for it. I think it is going to make my life easier with the smaller parts I make sometimes.

I was looking at tormach's offerings 4" and 5" and have read some thread on here that indicate that they are no very good quality vises.
There is also a reference to the 5" vise not being a standard size and thus not compatible with other tools? Can someone please explain?

Also what does 4" - 5" refer to? the left of the jaws, is this correct?
Thank you in advance.