This GX22151 is a dedicated replacement blade matching John Deere OEM specifications, integrally forged from high-strength carbon steel with heat treatment and anti-rust coating for excellent wear and impact resistance. The Predator-style toothed ends shred grass clippings quickly for efficient mulching. The 7-point star center hole fits John Deere riding mowers with 42" decks, ensuring secure, slip-free installation. It is an ideal accessory to restore cutting performance and improve lawn trimming quality.