John Deere blade kit includes 2 M154158 blades and 4 mounting nuts (2 different sizes) Kit part number is AM141040 (includes mounting nuts), individual blades are part number M154158 Fits the following lawn mowers WITH A 38″ MOWER DECK: 170, 175, 180, 185, 240, 245, 260, 265, 285, 320, X300, STX38, LX172, LX173 LX176, LX178, LT155, LT160, LT150, LT133, GT242, GT262, GT275, and F510 with a 38″ deck These are original John Deere blades