The 195858-1 Spool Set fits the DUR181, DUR141 and the UR180D. It has a low profile design to efficiently cut grass with less drag and the line is quick and easy to attach and remove. It has a bump line feed which helps with adjustment without having to stop the trimmer making life much easier. The metal reinforced bump knob gives extra protection to extend the life span of this. Features and Benefits: For use with the Makita DUR181, DUR141 and the UR180D Includes a bump and feed to aid adjustment without turning off the trimmer Metal reinforced bump knob for protection to extend life span The Makita 195858-1 is a replacement bump feed head that fits Makita grass trimmer models BUR181 BUR141 DUR181Z DUR141Z DUR140 DUR141 DUR180Z DUR181Z