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

Product ID: 16987102

Details

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

💎50 grit ceramic-aluminum oxide blend

⚙️Max 25,000 RPM spin speed

🛠️2-inch diameter precision fit

R605

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Description

⚡️ Elevate your metalwork game with the ultimate high-speed bristle disc!

DURABLE ABRASIVE LIFE - Proprietary ceramic grain blend retains sharpness longer than wire brushes
PRECISION FIT SPEED - 2-inch disc engineered for high-speed 25,000 RPM angle grinder use
VERSATILE METAL MASTERY - Ideal for automotive aluminum and metal polishing or rust removal
UNMATCHED SURFACE CONTACT - Flexible bristles maximize abrasive coverage for flawless finishes
TRUSTED INDUSTRIAL STANDARD - 3M quality with top-tier customer ratings and #4 rank in bristle discs

The 3M Scotch-Brite™ Roloc™ Bristle Disc RD-ZB 50 Grade is a 2-inch diameter abrasive tool designed for angle grinders, featuring a proprietary ceramic and aluminum oxide abrasive blend. It spins up to 25,000 RPM, delivering superior surface contact and long-lasting abrasive performance, perfect for automotive aluminum and metal polishing or rust removal. Highly rated and industrially trusted, it’s a must-have for professionals seeking precision and durability.

Specifications

ASIN	B002P55TX6
Best Sellers Rank	#17,136 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4 in Bristle Discs
Brand Name	3M
Compatible Devices	Angle Grinder
Compatible Material	Metal
Construction Type	Coated
Customer Reviews	4.6 4.6 out of 5 stars (849)
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
Manufacturer	3M
Material Type	Ceramic Abrasive Grain
Maximum Rotational Speed	25000 rpm
Model	048011-18730
Number of Items	10
Number of Packs	1
Part Number	MMM4801118730
Recommended Uses For Product	Polishing, Rust Removal
UPC	048011187303
Unit Count	1 Count
Warranty Description	Manufacturer

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R605

Duties & taxes included

In stock

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

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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The delivery time was excellent, and the packaging was secure.

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The product quality is outstanding. Exactly what I needed for my work.

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