It just tells me where the blade will run and so where the workpiece will be cut. I usually cut to a .5mm pencil line and where that line sits in the width of the laser shows how much of the line will be left after the cut. The alternative is to slide the workpiece forward and compare the line to the face of a saw tooth which is more accurate but more tedious so when I only need to be within .1" I just use the laser.?
