Material: Plastic，Length：67mm Good for thin grass and brush, not for young trees or other hard materials. For best results, avoid using this attachment for edging, working with bricks, chains or Suitable for RYOBI RAC155 RAC157 Trimmer 【À 【ABOUT REPLACEMENT BLADES】Made of PA6(Nylon), put the blades in water at night before using, they will last longer.
