An apparatus is disclosed for shaping the cross-section of a metal wire or metal ribbon product obtained by slitting metallic coil stock into multiple lengths of wire with an aspect ratio of 1 or ribbon having an aspect ratio of 2 or more. The product obtained from the slitting procedure is marred by the presence of a burr which impairs mechanical properties and consequently must be eliminated. In previous practice, this was achieved by feeding the slit product through the nip of a pair of mating, shaping rolls having a fixed engagement. However, problems arise from run to run when the rolls are in fixed engagement. For example, variations in the thickness of the material being processed presents difficulties with a fixed engagement.In the disclosed apparatus engagement is allowed to vary while the engagement force is held constant. In brief, this is accomplished by mounting the shaping rolls on separate support members with one of the support members being movable to permit the roll engagement to vary. A constant engagement force is maintained by the provision of a means for applying a constant downward force on the movable roll support member.