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2-Pack 20 Inch Replacement Mulching Mower Blades, Hardened Steel, Walk-Behind Deck

Original price was: $99.00.Current price is: $79.98.

Two hardened-steel 20-inch mulching blades for standard walk-behind decks. They chip clippings into fine mulch and restore a clean, even cut; verify the center-hole pattern before ordering, then swap in with basic hand tools.

Category:
20 Inch DeckMulching CutHardened Steel2-Pack SetEasy Swap
Two mulching mower blades on white
Two hardened-steel mulching blades for a clean, even cut on a 20-inch deck.
Why it matters

Dull blades tear grass instead of cutting it

When a mower blade loses its edge, the lawn does not just look worse. Frayed grass tips turn brown, clippings clump, and mulching stops chipping cleanly. A sharp replacement pair restores a clean cut without buying a new mower.

  • ▪  Brown, frayed tips.
  • ▪  A dull blade rips grass fibers rather than slicing them, leaving straw-colored ends that turn brown within a day or two.
  • ▪  Clumped, uneven cut.
  • ▪  Worn edges push and drag clippings into piles instead of dispersing them, leaving streaks and missed patches.
  • ▪  Poor mulching.
  • ▪  Blunt lifting fins fail to circulate clippings, so grass drops in long strands instead of chipping into fine mulch.
  • ▪  Extra engine strain.
  • ▪  A dragging blade forces the mower to work harder, shortening run time on a battery mower and raising fuel use on gas.
Dull torn grass versus clean mulched lawn
Left: dull, frayed cut. Right: clean, finely mulched stripe.
What it does

A sharp pair that chips grass and cuts clean

These two hardened-steel mulching blades are made to chip clippings into fine pieces, support even side discharge, and bring back a crisp, uniform finish on a standard 20-inch deck.

Swapping a blade under a walk-behind mower deck
Fitting a fresh blade under the deck in a home garage.
01
Fine mulching

Angled cutting edges and lifting fins chip clippings into small pieces that break down quickly on the lawn.

02
Even cut across the deck

The matched pair sits balanced across a 20-inch deck for a consistent sweep without missed strips.

03
Hardened steel build

Tempered steel holds an edge longer and resists bending from twigs and debris.

04
Simple swap

Fits with basic hand tools once you match the center-hole pattern to your mower.

Build & material

Built to hold an edge season after season

Each blade is made from tempered steel with a ground sharpened edge and a formed lifting fin, then delivered as a matched pair for balanced rotation.

Close-up of the sharpened edge and lifting fin
Ground cutting edge and formed fin in brushed steel.
  • ▪  Tempered hardened steel.
  • ▪   Resists flexing and impact when you hit gravel, twigs, or uneven ground.
  • ▪  Ground cutting edge.
  • ▪   A beveled slice edge cuts cleanly on the first pass instead of shredding.
  • ▪  Formed lifting fin.
  • ▪   Curved fin lifts clippings upward for recirculation and fine mulching.
  • ▪  Matched pair.
  • ▪   Both blades share length, pitch, and balance so the deck spins smoothly.
How to use

Swap in four simple steps

No shop visit required. Change the blades in your garage with basic tools after confirming fit.

01
Confirm fit

Measure deck width to 20 inches and compare the center-hole and bolt pattern before ordering.

02
Safety first

Disconnect the battery or spark plug and tilt the mower with the air filter up.

03
Remove old blades

Hold the blade steady, loosen the mounting bolt, and take out the worn pair, noting washer order.

04
Install and check

Fit the new pair in the same orientation, torque the bolt to your mower manual, and spin-check for balance.

Holding a blade to show length and thickness
Holding one blade to show its full length and thickness.
Specifications

What you get, in plain numbers

Standard dimensions for a 20-inch walk-behind deck; always cross-check your mower manual before fitting.

Specification Value
Product 2-Pack 20-Inch Replacement Mulching Mower Blades
Material Tempered hardened steel, ground cutting edge
Color Silver metallic
Deck fit Standard 20-inch walk-behind push / self-propelled deck (verify center-hole pattern)
Blade length Approx. 20 in (508 mm) per blade
Includes 2 mulching blades; mounting hardware not included
Warranty 30-day replacement on defects

Note: Center-hole and bolt patterns vary by mower brand and model. Compare your old blade hole shape and washer stack with the product photos before ordering; this is a generic compatible replacement, not an original-equipment part.

How it compares

Three ways to handle a dull cut

Same brown lawn, three choices. Here is how they line up.

At a glance This product Alternative
Cost Low: two replacement blades High: a whole new mower
Lasts A full cutting season per pair Depends on a professional service
Fit Check center-hole pattern at home Book a shop visit
What’s in the box

No surprises in the pack

You receive the blade pair only; the mower itself and mounting bolts are not included.

Specification Value
Product 2-Pack Mulching Blade Set
Includes 2 hardened-steel mulching blades
Material Tempered steel
Color Silver
Weight Approx. 2.6 lb per pair
Fit 20-inch standard deck; verify hole pattern
Warranty 30-day defect replacement
What you get

Two matched 20-inch mulching blades ready to install after a fit check.

Please note

Mower, battery, and mounting hardware are not included; confirm the center-hole pattern against your old blade.

Care & tips

Keep the edge between swaps

A few habits stretch the life of a fresh pair and protect your mower.

  • ▪  Raise the deck on rough ground.
  • ▪   Slow down and lift the blade over gravel, roots, and hard edges to avoid nicks.
  • ▪  Clean after each cut.
  • ▪   Rinse grass buildup from the deck and blade so moisture does not start rust.
  • ▪  Sharpen seasonally.
  • ▪   Touch up the edge twice a season and keep both blades matched for balance.
  • ▪  Store indoors.
  • ▪   Keep spare blades dry and off concrete to prevent surface rust.
Flat lay of blades, hardware pack and guide
Everything in the pack, top-down.
Will these fit my 20-inch mower?

They suit most standard 20-inch walk-behind decks, but center-hole and bolt patterns differ. Compare your old blade hole shape and washer stack to the photos before ordering.

Are these original-equipment blades?

No. These are generic compatible replacement mulching blades, not branded OEM parts; the mower itself is not included.

Do the bolts or washers come in the box?

Mounting hardware is not included; reuse your existing bolts and washers, or replace them if worn.

How often should I replace blades?

Plan on a fresh pair each cutting season, or sooner if you nick the edge on gravel or notice a brown, torn cut.

Can I sharpen instead of replacing?

Yes, a dull edge can be sharpened, but once a blade is bent, pitted, or thinned, replacement gives a safer, more balanced cut.

The short version
  • ▪  Two hardened-steel 20-inch mulching blades for a clean, chipped cut.
  • ▪  Fits most standard 20-inch decks after a center-hole check.
  • ▪  Easy home swap with basic hand tools; no shop visit.
  • ▪  Mower and mounting hardware not included.
Refresh the cut this season

A sharp matched pair brings back a clean, even lawn without buying a new mower. Check the hole pattern and order your pair.

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