When I ordered my mini-mill from Grizzly (GO758) I also ordered a MUCH too large vise for it. This vice is perfect for it! After dialing it in I found that the lower register, where the parallels would rest, was perfectly parallel to the table. The live jaw shifted less than. 001\" upwards when clamping. The live jaw also conforms slightly to unsquare stock.The larger more expensive vise did not measure out this well. If you are buying a mini mill get this vice. It is every bit as accurate as the mill you're putting it on!