Arnold 21-1/4-Inch Murray Extreme Mulcher Lawn Mower Blade 2 Pack For 42-Inch Deck MRR-42-EC Arnold 21-1/4-inch Murray Extreme Mulcher lawn mower replacement blade lets you cut, mulch, and edge with consistent precision Together theyll help you make a clean, sharp cut for a neater, healthier lawn Arnold blade accessories give you what you need for installing and maintaining your cutting edge For model MRR-42-EC 42-inch deck Includes 2 per pack