Can anyone please tell me where I can buy the replacement fiberglass brushes for this item?

There are replacements from Euro Tool PN: BRS-294.01. They used to be sold on amazon but it doesn't look like they are available right now. They are 1.25 inches long and an exact replacement for this brush.

Can you advance the fibers as the fibers wear down? Like a mechanical pencil as the lead wears down.

Yes you can advance the fibers just like a mechanical pencil. These are glass fibers and you should avoid getting the residue on your skin because it will cause you to itch but is not harmful. Pen is a life saver to clean awy corrosion from contacts.

What is the diameter of the fiber bundle?

in the pen, mine is not quite 3/16 on an inch in diameter, or about 4 mm. They are a tiny bit smaller ub the package, to allow you to more easily load them into the pen. They spread a tiny amount after you start using it. Hope this helps

Does it work with laptops and stuff? not the screen I'm talking about aluminum I need to polish the aluminum part behind the screen

It won't really polish. If you're looking for a shiny surface, this is not the tool for that. I will leave a surface looking like it had been worked on with a wire brush.I use mine to remove contaminants from battery terminals and other types of contacts.

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Scratch Brush, Fiberglass (Colors may vary)

Product ID: 9338852

Details

Brand
EUROTOOL
Bristle Type
Crimped Wire
Grit Material
Nylon
Material
Fiberglass
Product Dimensions
4.5"L x 0.5"W

🎨Assorted vibrant colors

⚙️4.5-inch precision length

🛠️Fiberglass bristles for durability

R517

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Rust doesn’t stand a chance—brush up your toolkit with precision and style!

TRUSTED BY EXPERTS - Top-rated with 4.6 stars from 477 reviews—join the savvy pros who rely on Eurotool quality.
COLOR YOUR WORKFLOW - Assorted vibrant colors add a pop of personality to your toolkit—because tools should be as dynamic as you.
COMPACT PRECISION POWER - Pen-shaped 4.5" handle fits tight, hard-to-reach spots with ease.
VERSATILE SURFACE SAVIOR - Perfect for metal and enamel, tackling grinding, deburring, and rust removal like a pro.
ENGINEERED FOR EXCELLENCE - Made in Germany with premium fiberglass bristles for long-lasting rust and corrosion removal.

The Eurotool Fiberglass Scratch Brush is a 4.5-inch, pen-shaped tool designed for precision rust and corrosion removal in tight spaces. Made in Germany with durable fiberglass bristles, it’s compatible with metal and enamel surfaces and comes in assorted colors. Highly rated by professionals, it’s the go-to brush for grinding, deburring, and restoring your gear.

Specifications

ASIN	B0019V18D2
Best Sellers Rank	#84,815 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #146 in Scratch Brushes
Brand Name	EUROTOOL
Bristle Type	Crimped Wire
Color	Assorted Colors
Compatible Material	Metal, Enamel
Customer Reviews	4.6 4.6 out of 5 stars (477)
Grit Material Type	Nylon
Grit Type	Coarse, Medium, Fine, Super Fine
Item Diameter	0.5 inches
Item Dimensions	4.5 x 0.5 x 0.04 inches
Item Dimensions L x W	4.5"L x 0.5"W
Item Weight	13.61 g
Manufacturer	Eurotool
Material Type	Fiberglass
Model	BRS-294.00
Number of Packs	1
Number of Pieces	1
Part Number	BRS-294.00
Recommended Uses For Product	Grinding, Rust Removal, Deburring
UPC	654207124245
Unit Count	1 Count

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