Ol Rich,
Save yourself aggrevation down the road and look into either the Renzetti or Dyna King vises. They are the best rotary vises on the market, period. The Renzetti Saltwater Traveler vise is an excellent value for under $200.00.
I have gone through many vises in the 40 years I have been tying flies. Thompson (Models A and 360), , Herter's (Model 9), Xuron (went through a standard and a rotary of this one), Regal, Universal Vise (they used to make a very nice all aluminum rotary in the 60's, unfortunately, the cam levers never held up and when you had someone make a new one for you it was invariably steel and it ruined the jaws at the cam surface), and several Japanese and Indian copies of various vises (bought when I was in grades 7-12 because I thought they were a good buy).
I wore everyone of these Manufacturer's vises out. Jaws sprung on big hooks, jaws chipped (Regal), cam lever wore out or broke (Thompson, Herter's, Universal Vise), jaws grooved (Xuron), vise collets wore out and wouldn't let the jaws be tightened sufficiently (Thompson, Herter's), rotary feature developed too much play after a few years of use (Thompson 360), Jaws bent (Japanese and Indian copies, and cam lever broke (Xuron).
I use a Dyna King Baracuda (have been for the last 5 or 6 years). I rate the Renzetti and Dyna King vises as the best in the business, they are so well built and both do as advertised year after year. In retrospect, I should have bought a Renzetti back in the early to mid 70's when they were first produced. I could have bought a Renzetti 300 then for $69.00 (they are about $400.00 now) direct from the manufacturer (heck I could have driven to the manufacturer to pick it up because I only lived 1 1/2 hours away from where they were being made in Pennsylvania at the time) It would have saved my a lot of money, time, and aggrevation.
The EZ Vise is not made out of the same long lasting materials as the Renzetti and Dyna King. Buy a Renzetti or Dyna King and you will never need to buy a vise again in your lifetime, nor will you need to replace parts for it wither.