This ensures a smooth and hassle-free line feeding experience, allowing continuous trimming without interruptions. Fit for models: Multi Trim 250D, Multi Trim 250DX, Multi Trim 300D, Multi Trim 300DX, Multi Trim 250 Plus Twin, Multi Trim 300 Twin, Fit for models: Power Trim 300, Power Trim 500 (product no: 9648596-25/62), Power Trim 500 XT, Power Trim 700 (product no: 9648597-25/62), Power Trim PWT23, 2000 (twin line), 2300 (twin line), 2500 (twin line), PTXT25, SET250, SET300, STXT25, Speedi Trim, Twist'n'Edge.