Will these work for a Dewalt DW421 orbital sander?

As long as it has a 5"... 8-hole Sander Pad, it should work just fine. I had to replace the Hook and Loop Sander Pad on my Porter cable and all Ace had was a Dewalt replacement and it works great with this sandpaper. By the way, this sandpaper works as good and lasts just as long as the more expensive name brands and I do plan on getting more. Hope this helps!

what country are they made?

I am sorry for taking so long to answer. The listing did not show place of manufacturing item. On this item the label said Asian. Sorry for not giving you a good answer.

Do you have a variety pack of sanding discs?

Yes, we have a variety pack of sanding discs, which include 15pcs of each grit: 60/80/120/150/220/320/400. Product link below: https://www.amazon.com/gp/product/B0883GFY92

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Aiyard 5-Inch 8-Hole Hook and Loop Sanding Discs 80-Grit Random Orbit Sandpaper, 100-Pack

Aiyard 5-Inch 8-Hole Hook and Loop Sanding Discs 80-Grit Random Orbit Sandpaper, 100-Pack

Product ID: 426360386

Details

Grit material
Aluminum Oxide
Product dimensions
12.7L x 12.7W
Brand
Aiyard
Compatible devices
Angle Grinder
Grit type
Dry Wet

⚡80-grit fused alumina for fast, durable finish

🔩100-pack for nonstop sanding

🕳️8 pre-punched holes for superior dust extraction

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NZ$147

Duties & taxes included

In stock

Sold byAmazon New ZealandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Sand smarter, not harder — upgrade your finish game!

DUST FREE WORKSPACE - 8 strategically placed holes optimize dust collection for cleaner, safer work.
ENDLESS PRODUCTIVITY - 100 discs per pack keep your projects moving without pause.
PRECISION GRIT POWER - 80-grit fused alumina grain delivers sharp, long-lasting sanding performance.
VERSATILE COMPATIBILITY - Fits most 5-inch 8-hole random orbital sanders for multi-material mastery.
QUICK CHANGE CONVENIENCE - Velcro backing ensures fast, secure disc swaps—no slipping, no downtime.

The Aiyard 5-Inch 8-Hole Hook and Loop Sanding Discs come in a 100-pack of 80-grit aluminum oxide discs designed for dry sanding. Featuring premium fused alumina grain and a durable binder, these discs offer fast, long-lasting sanding with excellent wear resistance. The pre-punched 8-hole design enhances dust extraction, while the Velcro backing allows quick, secure attachment to most 5-inch random orbital sanders. Ideal for wood, metal, fiberglass, and more, these sanding discs deliver professional-grade results for demanding projects.

Specifications

Manufacturer	Aiyard
Part number	GSD80
Item Weight	870 g
Item model number	GSD80
Size	80 Grit,100-Pack
Colour	Gold,Random
Style	80 Grit, 100-Pack
Material	Aluminum Oxide
Cutting Diameter	5 Inches
Grit Number	80.00
Grit Description	Dry, Wet
Included components	100PCS 80 Grit Gold Sanding Discs
Batteries included?	No
Batteries Required?	No
Item diameter	5 Inches

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