Its a vise stop rig that lets you move the stop anywhere in three axes (the X is in 1.000″ increments) so that once you set the stop to zero on dial or drp, it works for every shape and size of work or even can be removed and put back with excellent repeatability. The basic need is, the spot on the work where you need to position the stop is always changing. With this, I get better than .001″ accuracy positioning the stop anywhere in the work envelope. I’ve found it a real treat to use. Once you zero the Y to the fixed jaw, its really nice how you know that is zero, task after task, right?. This gives you same in X direction. Once set it to zero you don’t have to go through the repetitive task of finding the edge no matter the part’s shape.

While moderately self serving to say so, if you haven’t thought of subscribing to Home Shop Machinist, please consider it. There are preciously few outlets encouraging and distributing complete projects like this so imo its good to support it. Its takes a massive effort to put out a complete and detailed set of drawings photos and how-to article; if there was not a mag to publish it, who would bother?