The RYOBI Dual Bladed Trimmer Head easily attaches to most RYOBI Cordless or Hybrid String Trimmer*. Slice through brush, thick grass & weeds, and pulpy stalks with the dual serrated blades. Turn your trimming jobs and yard clean up into an easy chore with the RYOBI Dual Bladed Trimmer Head. *Not compatible with the 40-Volt Expand-it Trimmer Attachment. (Model #RY15523)