5 blade cutting disk for Husqvarna 430X, 430XH, 450X, 450XH, 450X EPOS, 450XH EPOS, 520, 520H, 520 EPOS, 520H EPOS, 550, 550H, 550 EPOS, & 550H EPOS Automower models. Please watch the video below to determine whether you need just the cutting disk, or a 5 disk kit for your mower. 
 
Video: Will a 5 blade cutting disk work on your mower?
For 5 blade cutting disk kit (including screws & skid plate) click HERE