Ryobi Genuine OEM AC04105 8&rdquo; Replacement Heavy Duty Reversible Steel Tri-Arc Brush Cutting Blade for Ryobi Expand-It Models COMPATIBLE MODELS INCLUDE: Ryobi Brush Cutters (RY254BC, RY40255-BRC) and the Expand-It Brush Cutter Attachment (RYBRC77) APPLICATIONS: Use this blade for cutting through thick brush and weeds in your home or professional landscaping jobs HARDENED STEEL provides these blades with optimal durability REVERSIBLE: You can extend the life of your blade by flipping it around, utilizing its unused cutting edges EASY INSTALLATION: If you have the brush cutting Expand-It attachment, you will have access to a set of instructions and wrench for the blades installation