I bought this Freud 8" Super Dado set, hoping to improve on my Sears Excalibur adjustable. Success! The adjustable Sears blade left a slight roundness at the bottom of the cut. When making finger joints, you could see a slight belly where the bottom of the groove met the flats of the adjoining finger. With the Freud Super Dado, it makes a perfectly flat mating. Not even a thousandths of a gap anywhere along the edge of it.