What is the recommended speed for these bits?

None of these bits are large diameter cutters so Iyou can use the high speed setting. This chart might be helpful. it's what I go by. Bit Diameter Maximum Speed Up to 1 inch 24,000 rpm 1 to 2 inches 18,000 rpm 2 to 2-1/2 inches 16,000 rpm 2-1/2 to 3-1/2 inches 12,000 rpm

Can this router bit be used on rocks?

Absolutely not! A router can spin at speeds of up to 25,000 rpm. Even though these are carbide and a tough material the end result of using them on stone would undoubtedly yield delamination of the carbide edges, flying bits of high speed metal and pieces of rock. Attempting to use these on rock could result in serious injury or even death. These are manufactured to shape WOOD!!! Perhaps you can find some type of grinder attachment which would allow you to alter stone but don't use these bits for that purpose.

Do these bits all have ball-bearing guides? It doesn't mention that anywhere.

I have not used all of them yet, but all the ones that I have used approximately 50% of them all did . did not pay attention if others did or not.

What is the best way to sharpen the bit?

The preservation method is different for everyone. For example, I use precision flat stones on the surface and edges, and a sheet of 2000 grit W&D sandpaper on the precision granite surface.

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Router Bits 35 Pcs Set

Product ID: 320144229

Details

Brand
MNA
Cut Type
Cut
Item Weight
2.8 kg
Material
Carbide
Size
35 Pieces 1/2

🔩Universal 1/2” shank fits all major routers

🪵Fits all wood types: MDF, hardwood, softwood

⚙️35 precision carbide-tipped bits

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Description

⚡ Elevate your woodworking game with precision and power!

COMPLETE 35 PIECE SET - Everything a pro woodworker needs in one sleek aluminum case
VERSATILE WOODWORKING - Perfect for MDF, hardwood, softwood, and particle board projects
PREMIUM C 3 CARBIDE TIPS - Superior wear resistance and razor-sharp edges for flawless finishes
UNIVERSAL COMPATIBILITY - Seamlessly fits handheld and benchtop routers from top brands
TRUSTED AMERICAN STANDARD - Precision engineered to meet strict American dimension and quality standards

The MNA Router Bits 35-Piece Set features premium C3 carbide-tipped bits with a universal 1/2-inch shank, designed to fit all major routers. Engineered to American standards, this complete kit offers superior durability and sharpness, ideal for working on MDF, hardwood, softwood, and particle board. Packaged in a professional aluminum case, it’s the ultimate toolkit for serious woodworkers seeking precision and versatility.

Specifications

ASIN	B091YJWG8B
Best Sellers Rank	#70,108 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #64 in Edge Treatment & Grooving Router Bits
Brand Name	MNA
Customer Reviews	4.5 4.5 out of 5 stars (1,229)
Cut Type	Carbide-Tipped Cut
Cutting Diameter	0.5 inches
Item Diameter	0.5 inches
Item Weight	2.8 kg
Manufacturer	MNA
Material Type	Carbide
Model	PCS-3512
Number of Flutes	1
Number of Items	1
Part Number	PCS-3512
Size Name	35 Pieces 1/2 Inch Shank
UPC	770773583146
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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₨82458

Duties & taxes included

In stock

Sold byAmazon Sri LankaDelivered 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 Sri Lanka.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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