Updated 3 blade cutting disk for 430X, 430XH, 450X, 450XH, 520, 520H, 550, 550H model Automowers with a serial number starting with 16, 17, 18, or 19. This kit improves the cutting capacity by allowing more of the blade cutting edge to be exposed. 
 
Kit includes:
- Cutting disk
- Skid plate
- Flange screws for cutting disk
 
Video 1: How updated cutting disk and shield improves cutting ability
Video 2: How to install this kit