Thought you guys might get a kick out of this. It's a cool little saw has grease instead of lube it . Doubt that's right but I don't use it. Saw blade uses a "double D" hole like a circle with the top and bottom clipped flat and it's a 5 1/2 I think . Half debated having a machinist take it down to a normal arbor size. Any way it's cool and runs great. Not all that heavy. Yeah real original there DEWALT!