Rotary Evolution replacement blades are made of black etched carbon steel. The set contains 9 blades and the screws that go with them, so a blade change is done in one go without hunting for fasteners.
The set replaces Husqvarna 5950844-01, 5950844-02, 5950844-03 (Automower Endurance) and fits Husqvarna Automower 105, 265 ACX, 305, 305E NERA, 310, 310 Mark II, 315, 320, 320 NERA, 330X, 405VE/405X/405XE NERA, 410VE/410XE NERA, 415X, 420, 430X, 430X NERA, 435X AWD, 440, 450X, 450X NERA, Aspire R4+ and Solar Hybrid.
Change all blades at the same time. A robotic mower runs with its blades balanced against each other, and a single new blade among worn ones makes the disc run unevenly.