I received the SD206 6" Dado Set and immediatly noted some differences in what was advertised and what was received. The SD206M has 20 teeth (10 on each outside blade) and not the 24 that is advertised. Popular Woodwooker as recently as their April 2001 issue listed the set with 12 teeth as well as on the case the set arrived in.  Another point, the blades also have a polished finish as opposed to earlier versions matte black oxide that are often illustrated. Such was the overwhelming body of data I was concerned that perhaps I had received a "knock-off" instead of the real Freud.  So...I ended up calling Freud's 800 number and was reassured that the 6" version indeed has less teeth than advertised. Once something is put in print, I guess it's just assumed to be true.