I bought this to use with a mini mill. When I bought it I was concerned that it may be a little loose or sloppy. But when I received it and put it on the mill, it iwas better than I thought it would be. It is tight and accurate and has adjustments for tightness. All the surfaces on the vise are nice too. I previously had a large 6" vise of a different brand on a larger mill, but wanted something small for the mini mill.