Mulching Blades Replacement for Toro Toro Model 20377 Blade 20374 20376 20377 20378 20379 20655 20656 21329 21378 21442 21445 21447 21462 21464 21465 Lawn Mower

What It Is

This is a set of mulching blades designed for select Toro lawn mowers, including models 20374–20379, 20655, 20656, 21329, 21378, 21442–21447, and 21462–21465. They cut grass into fine clippings that decompose quickly, returning nutrients to the lawn—ideal for frequent mowing without bagging.

Fitment & Compatibility

• Deck size: Fits 21-inch and 22-inch cutting decks (check your mower’s deck width stamped on the underside).
• Model match: Confirm your Toro model number (e.g., 20377) is listed above. The blades are a direct replacement for OEM part numbers 20374, 20376, 20377, 20378, 20379, 20655, 20656, 21329, 21378, 21442, 21445, 21447, 21462, 21464, and 21465.
• OEM vs aftermarket: These are aftermarket blades, not genuine Toro. They must match the exact length (approx. 21.5 inches), width (2.25 inches), and center hole diameter (5/8-inch) of your original blade. Measure your old blade before buying.
• Not universal: Will not fit other brands or Toro models with different blade part numbers. Double-check your mower’s blade part number on the existing blade or in the owner’s manual.

Key Things to Know

• Quality: 4.4/5 stars from 9 reviews—generally good, but limited feedback. Some users report slightly thinner steel than OEM; inspect for bends or cracks before mounting.
• Installation: Easy with basic tools—use a socket wrench to remove the center bolt. Torque to 30–40 ft-lbs. Always disconnect the spark plug first.
• Common gotchas: The blades may come with a sharp coating that wears off quickly; sharpen after 10–15 hours of use for best mulching. Ensure the blade is installed with the lift wings pointing up toward the deck.
• Mulching vs bagging: These are for mulching only. If you switch to bagging, you’ll need standard blades.

Should You Buy It

Buy if you own one of the listed Toro models and want an affordable mulching blade set for frequent mowing without bagging. It’s a solid value for the price, but check your blade measurements and model number first—aftermarket fitment can vary slightly. Not for heavy-duty or commercial use.