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expiredDaddyScholz posted Sep 27, 2021 12:23 AM

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expiredDaddyScholz posted Sep 27, 2021 12:23 AM

DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - $3.49

$3.49

$15

76% off

Amazon

9 Comments 6,859 Views

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Amazon.com [amazon.com] has DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) for $3.49, regular price is $14.58. Shipping is free with Prime or on orders $25+.

These things are great for sharpening lawn mower blades, taking paint or rust of metal objects, etc.

About this item:
Zirconia grit enables 3X faster material removal than fiber resin metal sanding discs
Premium abrasive cloth provides up to 15 X longer life than fiber resin metal sanding discs
Type 29 fiberglass backing provides grinding angle of 20-25 degrees

https://www.amazon.com/gp/product...UTF8&psc=1

Deal Score

+12

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Price Intelligence

Model: 4-1/2" x 7/8" 80g type 29 HP flap disc

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Today

Post Date	Sold By	Sale Price	Activity
08/04/25	Amazon	$4.59	0
02/07/21	Amazon	$3.50 frontpage	28

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Sort: Lowest to Highest | Last Updated 8/5/2025, 04:37 PM

Sold By	Sale Price
Ace Hardware	$11.99
Amazon	$4.59

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9 Comments

xenidus

Sep 27, 2021 01:36 AM

1,291 Posts

Joined Jan 2010

Sep 27, 2021 01:36 AM

xenidusSep 27, 2021 01:36 AM

1,291 Posts

Dewalt tools = A+

Dewalt Accessories (bits, sanding pads etc) = C- to D range

They notoriously score at the bottom of the barrel for "cost per performance" metrics on Project Farm Tests: https://www.youtube.com/channel/U...-wuOg_p0Ng

They got spanked pretty bad for this massive sandpaper show down as well: https://www.youtube.com/watch?v=NZDCRFi8dKY

Not the same product, but I bet it is the same manufacturing process.

Just my 2 cents...

DaddyScholz

Original Poster

Sep 27, 2021 01:41 AM

350 Posts

Joined Nov 2012

Sep 27, 2021 01:41 AM

DaddyScholz

Original Poster

Sep 27, 2021 01:41 AM

350 Posts

Quote from xenidus

I have sharpened countless lawnmower blades and cleaned up all sorts of metals and I am still on my first disk.
I couldn't be happier, even if I had paid full price...

texasranger556

Sep 27, 2021 01:51 AM

386 Posts

Joined Mar 2007

Sep 27, 2021 01:51 AM

texasranger556Sep 27, 2021 01:51 AM

386 Posts

If you need enough to justify the shipping, LVA is the way to go https://www.lehighvalleyabrasives...fd4-5-40zf

Loudog504

Sep 27, 2021 01:52 AM

3,900 Posts

Joined Jan 2011

Sep 27, 2021 01:52 AM

Loudog504Sep 27, 2021 01:52 AM

3,900 Posts

I've never had any issues with dewalt grinder disk. But not that i use them all day, just here and there.

NOW sand paper on the other hand... Stay away unless its dirt cheap.

rockstarjeremy

Pro

Sep 27, 2021 04:23 AM

1,074 Posts

Joined Sep 2003

Sep 27, 2021 04:23 AM

rockstarjeremy

Pro

Sep 27, 2021 04:23 AM

1,074 Posts

Is this good on feet?

Jeppedy

Sep 27, 2021 04:24 AM

243 Posts

Joined Dec 2004

Sep 27, 2021 04:24 AM

JeppedySep 27, 2021 04:24 AM

243 Posts

Dead. Deal no longer available

nugget-tn

Sep 27, 2021 04:27 AM

139 Posts

Joined Dec 2016

Sep 27, 2021 04:27 AM

nugget-tnSep 27, 2021 04:27 AM

139 Posts

Quote from rockstarjeremy

is this good on feet?

😂 😆 😝

ScottLoo

Sep 27, 2021 04:44 AM

10 Posts

Joined Sep 2017

Sep 27, 2021 04:44 AM

ScottLooSep 27, 2021 04:44 AM

10 Posts

Quote from Jeppedy

Dead. Deal no longer available

Gone, fast

HPPTT

Sep 27, 2021 05:08 AM

425 Posts

Joined May 2011

Sep 27, 2021 05:08 AM

HPPTTSep 27, 2021 05:08 AM

425 Posts

60 grit version available at $3.8

Unregistered (You)

Home & Home Improvement Tools Drills & Power Tools DeWalt Amazon

DEWALT Flap Disc, Zirconia, 4-1/2-Inch x 7/8-Inch, 80-Grit (DW8309) - $3.49

$3.49

$15

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