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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🛠️ Power through metal prep like a pro with 3M’s Roloc Bristle Disc!

TRUSTED 3 M QUALITY - Engineered with premium aluminum oxide & ceramic for long-lasting performance
DURABLE COARSE GRIT 50 - Aggressive abrasive action for tough aluminum and metal surfaces
PRECISION 2 INCH DIAMETER - Compact size for detailed automotive and metal work
ROLOC QUICK CHANGE SYSTEM - Seamless disc swaps to keep your workflow unstoppable
UNMATCHED SPEED EFFICIENCY - Spin up to 25,000 RPM for rapid surface prep

The 3M 048011-18730 Roloc Bristle Disc Grade-50 is a 2-inch diameter abrasive disc designed for high-speed surface preparation on automotive aluminum and metal. Featuring a coarse Grit 50, it spins up to 25,000 RPM, delivering aggressive and efficient material removal. Made with durable aluminum oxide and ceramic, this disc ensures long-lasting performance and quick changes with the Roloc system, making it an essential tool for professionals demanding precision and speed.

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Manufacturer	3M
Part number	MMM4801118730
Item Weight	18 g
Item model number	048011-18730
Size	2
Colour	Green
Material	Aluminum Oxide, Ceramic
Item Package Quantity	1
Number of handles	1
Cutting Diameter	2 Inches
Grit Number	50
Grit Description	Coarse
Included components	3M 3M-18730 Roloc Bristle Disc Grade - 50, Size - 2
Batteries included?	No
Batteries Required?	No
Item diameter	2 Inches

3M 048011-18730 2 3M-18730 Roloc Bristle Disc Grade-50, Size, Green

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