Are with Feather together the sharpest, keep not quite so long. But they cost only a fraction. The blades come in cartons of 5 pieces. A design award you do not get it - what but not my intention. I am very happy with it. Small disadvantage: The used blades must be disposed of separately, as the silhouette target have no receiver for the used blades. But it is more environmentally friendly. ;-)
