Align-A-Saw PlateThe Align A Saw Plate replaces your blade for critical table alignments and squaring your blade. It has a massive 3 8" thick, solid steel surface that has been ground to a flatness tolerance of . 002" and extends the distance from front to rear to a generous 12"about 50% more available front to back distance and no teeth to work around. When you need to check the alignment of your miter slot to the saw arbor, just remove your saw blade and replace it