I buy these for our custom wood products business. It costs me $60 to get a dado set sharpened or you can buy this set new for $90. It doesn't take long to decide the new set is a better value especially when the sharpened set almost always comes back leaving ridges at the bottom of the cut. As far as setting the width, come on guys, if you can't set the width on a dado you probably shouldn't be playing with sharp objects.