An inside-out cutter for material such as tow in which there is a single pressure roller, which roller has an outside diameter larger than one-half the inside diameter described by the cutting edges of the blades. The large diameter of such roller provides a gradual rather than an abrupt entrance-way for the fiber between the roller and the blades. The apparatus further is constructed to permit the movement of the pressure roller to be moved from a fiber cutting relation to the blades to a more centered position for removal of the roller from the apparatus, as when changing blades or the like.