Replacement XHT Lawnmower blade. XHT(Xtreme Hardness & Toughness) blades are 25-40% harder than standard lawnmower blades. Benefits of the HXT blade are sharper and longer lasting cutting edges.More Resistance to bending. Tighter tolerances in the aftermarket vs. OEM. XHT blades also offer greater impact toughness. (2) blades for 38" cut. OEM Cross Reference AM137325, M112991, M154158, 330-736, 6186, 91-403 OEM Cross Reference AM137325, M112991, M154158 Compatible with models: John Deere RIDING MOWER: F510 (38") John Deere RIDING MOWER: F525 (38") John Deere RIDING MOWER: GT225 (38") John Deere RIDING MOWER: GT235 (38") John Deere RIDING MOWER: GT242 (38") John Deere RIDING MOWER: GT245 (38") John Deere RIDING MOWER: GT262 (38") John Deere RIDING MOWER: GT275 (38") John Deere RIDING MOWER: GX325 (38") John Deere RIDING MOWER: GX335 (38") John Deere RIDING MOWER: GX345 (38") John Deere RIDING MOWER: GX355 (38") John Deere RIDING MOWER: LT133 (38") John Deere RIDING MOWER: LT150 (38") John Deere RIDING MOWER: LT155 (38") John Deere RIDING MOWER: LT160 (38") John Deere RIDING MOWER: LT166 (38") John Deere RIDING MOWER: LT170 (38") John Deere RIDING MOWER: LT180 (38")