TINGYU 8" Edger Blade Replacement,AC04215 Reversible Heavy Duty Hardened Steel Edger Blade,Compatible with Ryobi Edgers Models UT50500, UT15518, RY15518, RYEDG11, P2310 and P2300B (1-Pack)

Compatible Models: UT50500, UT15518, RY15518, RYEDG11, P2310 and P2300B. Blade Size: 8 Inch Blade Length, 1 Inch Arbor, 0.1 Inch Blade Thickness, 1.98 Inch Width MATERIAL: Made of heavy duty hardened-steel, study and durable. Blades can tear through thick organic matter or take down the edges of your lawn while brushing up against concrete or asphalt.And the blade will wear down and need to be replaced.This is what you need. Extending the life of the blade by reversing it when dull to make use of fresh cutting edges and using both sides of the blade. Drilling a hole in the blade will let you know when the blade needs to be replaced.