Most modern portable planers come ready fitted with disposable double edged solid carbide knives. The rotational speed of the cutter block enables a high class of finish to be achieved, even with such a thin blade. Gone are the days of having to sharpen and then laboriously reset and recheck large high speed steel knives. As can be appreciated there are only a handful of manufacturers in the world who make this type of knife, so all power tool makers buy them from limited sources with the result that the knives are a universal size and fit most makes of machine other than some DeWalt Planers and the Elu MFF81 which take 80.5mm long knives, all others in our range use 82mm.-bg