Leave it to freud to design a blade set that makes cutting the most popular box joint almost trivial. One of the major problems when using a standard dado blade or dado set for box joints is the small (or not so small, depending upon the blade) nick at the corner of each pin.
It is formed by the beveled scoring teeth present on most dado set outside blades, and on all Alternate Top Bevel ground blades. Freud’s Box Joint cutter set has perfectly flat top ground teeth, eliminating this aggravation. The set is designed to cut perfect 1/4" or 3/8" joints without shims or adjustments. Just reverse the blades to change joint width. Freud even includes complete instructions for construction of a box joint jig. Made in Italy.