Fiskars 196600-1001 / 12-9660 12 inch/30cm Type F Replacement Cutting Bar. When the blade no longer rolls smoothly or loses precision (and you tried changing blades) it's time to rotate and/or replace the cutting bar. For 12 inch 28mm high capacity rotary trimmers. Works with the 12-9902 7097 and 12-9908 7097 12 inch Style F Rotary Trimmers, not included.