How many do you get for 16.58?

Just one of them. It is a 2" 50 grit (green) Roloc disc. You also will need the Roloc 2" adapter if you do not have it already. These bristle discs do last a long time though.

Is this product used with a regular grinder?

These bristle discs come in different sizes, as well as different grits. They come in 2",3" and 4 1/2" The 2" ones shown here, attach to a roloc adapter that ends in a 1/4" shaft. It is intended to be used in a die grinder which come straight or right angle. The large 4 1/2" discs are intended for use in a regular right angle grinder. They are also made in wheel form for use on a bench grinder. BTW the roloc adapters also accept Scotch Brite pads of various grits. These are expensive; the 4 1/2 ones are REALLY expensive

Do you recommend using these for carbon buildup on piston heads?

Maybe use one of the the higher grit ones yes. They work quite well. Used one to clean the heads on our explorer when we rebuilt the engine just don't dig into and put a lot of pressure on it let the bristles do the work

Looking for something to scuff between layers of fiberglass and epoxy on a boat, would this be easier than by hand or a orbital sander?

These guys are pretty small so think about surface area. Personally I tried work bigger than 2 square feet and eventually moved to other tools

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Scotch-Brite™ Roloc™ Bristle Disc, RD-ZB, 50, TR, Green, 2 in x 5/8 in, Tapered

Scotch-Brite™ Roloc™ Bristle Disc, RD-ZB, 50, TR, Green, 2 in x 5/8 in, Tapered

Product ID: 16987102

Details

Brand
3M
Compatible Devices
Angle Grinder
Grit Material
Ceramic Oxide
Grit Type
Medium
Product Dimensions
2"L x 2"W

🌀2-inch diameter for precision control

⚙️Max 25,000 RPM spin speed

🛠️50 grit ceramic-aluminum oxide blend

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Details

Brand
3M
Compatible Devices
Angle Grinder
Grit Material
Ceramic Oxide

Description

🛠️ Power through rust and grime like a pro—because your toolbox deserves the best!

COMPACT COMPATIBLE - 2-inch size fits standard angle grinders for versatile, on-the-go use.
HIGH SPEED EFFICIENCY - Operates at up to 25,000 RPM to power through tough automotive and metal prep jobs.
UNMATCHED SURFACE CONTACT - Flexible bristles maximize abrasive coverage for faster, smoother results.
PRECISION RUST GASKET REMOVAL - Safely strips stuck gaskets and rust without damaging underlying metal.
DURABLE CERAMIC ALUMINUM OXIDE BLEND - Retains abrasive power throughout the disc’s lifespan for consistent performance.

The Scotch-Brite™ Roloc™ Bristle Disc RD-ZB 50 Grade is a 2-inch, medium grit abrasive tool designed for automotive and metal surface prep. Featuring a proprietary ceramic and aluminum oxide abrasive blend on flexible bristles, it delivers superior surface contact and consistent abrasive performance at speeds up to 25,000 RPM. Ideal for rust removal and gasket cleanup, it fits standard angle grinders and offers professional-grade durability and precision.

Specifications

ASIN	B002P55TX6
Best Sellers Rank	#11,132 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Bristle Discs
Brand	3M
Brand Name	3M
Compatible Devices	Angle Grinder
Compatible Material	Metal
Construction Type	Coated
Customer Reviews	4.6 out of 5 stars 818 Reviews
Grit Material	Ceramic Aluminum Oxide
Grit Material Type	Ceramic Aluminum Oxide
Grit Number	50
Grit Type	Medium
Included Components	3M 3M-18730 Roloc Bristle Disc Grade - 50, Size - 2
Industry Standard Identifier	3M-18730
Item Diameter	2 Inches
Item Dimensions	2 x 2 x 2 inches
Item Dimensions L x W	2"L x 2"W
Item Thickness	2 Inches
Item Type Name	3M 3M-18730 Roloc Bristle Disc Grade - 50, Size - 2
Item Weight	27.22 g
Manufacturer	3M
Material Type	Ceramic Abrasive Grain
Maximum Rotational Speed	25000 RPM
Model	048011-18730
Number of Items	10
Part Number	MMM4801118730
Product Dimensions	2"L x 2"W
Recommended Uses For Product	Polishing, Rust Removal
UPC	048011187303
Unit Count	1.0 Count
Warranty Description	Manufacturer

Reviews

B**Y

17.11.2025

J**A

20.01.2026

N**N

22.12.2025

G**C

4.04.2026

G**O

9.09.2025

T**Y

23.01.2026

M**W

15.03.2026

B**K

2.05.2026

G**4

2.08.2024

S**D

24.09.2023

A**R

25.12.2025

D**L

14.03.2024

M**E

29.04.2025

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