Align full and thin kerf blades to default zero cut line, riving knife or splitter settings. The clever MatchFit Arbor Shims solve the age old problem of blade alignment when changing blades. No more separate tap or ruler measurements. No more adjustment or removal of your riving knife for blade changes. Achieve more accurate cuts with less wasted material and time saved! Simply use the MatchFit Arbor Shims and you can calibrate your saw for each and every blade in your shop!