Replaces the following OEM part numbers: These are Predator Commercial Mulcher Blades! JOHN DEERE: M12245 JOHN DEERE M122455 JOHN DEERE M122467 JOHN DEERE 2 BLADES NEEDED FOR 36″ MACHINES Center Hole: 1 X 1-1/8″ Width: 2-1/2″ Thickness: .197″ Length: 18-5/8″ Fits the following John Deere models (UNSPECIFIED): MULTIPLE (36″) John Deere ROLLER LIFT: GS25 (36″) John Deere ROLLER LIFT: GS30 (36″) John Deere ROLLER LIFT: GS45 (36″) John Deere ROLLER LIFT: GS75 (36″) John Deere ROLLER LIFT: G15 (36″) John Deere MANUAL: HD45 (36″) John Deere MANUAL: HD75 (36″)