How well do these hold up against carving into steel? Like for example if I wanted to add detail to a steel rod.

Hold up well. Better than I expected. I use them for finish work on guns.

The description says 1/8" shank, but the illustration shows 3 mm - which is it? (1/8" does not equal 3 mm. 1/8" = 3.2 mm.) Thanks!

The shank is 1/8th inch, I just pulled one out a measured it.

Are these good for shaping leather?

"Shaping leather"? Let's see, assuming you want to add texture or even holes to your leather, and you wanted to use drill bits, it seems like overkill to use these carbide bits, even a cheap set that can carve very hard materials at least until they wear out. I did a little net search and most references to drill bits and leather just used regular metal bits or hand tools. Careful when drilling through leather as you might start making holes in whatever is underneath. One neat trick showed leather sandwiched between plywood to hold it down, be accurate, save your fingers, and to protect your work surface. Hope this helps.

How does it do on seashells? 😆 other than that im glad it works to smooth out welds.

Hi, this item works great on seashell.

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Double Cut Carbide Rotary Burr Set - 10 Pcs 1/8" Shank, 1/4" Head Length Tungsten Steel for Woodworking,Drilling, Metal Carving, Engraving, Polishing

Product ID: 149472540

🔄Double cut for smoother, faster carving

⚙️Tungsten Carbide durability

🛠️1/8" shank fits most rotary tools

5157 som

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Description

🔧 Carve your mark with precision and power — don’t get left behind!

PRECISION FIT - 1/8" shank perfectly compatible with Dremel and most rotary tools for flawless centering.
COMPACT ORGANIZED - Includes a sleek plastic storage case to keep your burrs safe and ready for action.
UNMATCHED DURABILITY - Tungsten carbide construction lasts 10x longer than high-speed steel, crushing wear and tear.
PRO LEVEL PERFORMANCE - Achieve professional-grade carving, engraving, drilling, and polishing with ease.
EFFORTLESS VERSATILITY - Double cut design excels on wood, plastic, aluminum, and metal for all your creative projects.

This 10-piece Double Cut Carbide Rotary Burr Set features 1/8" shanks and 1/4" cutting heads made from ultra-durable tungsten carbide. Designed for woodworking, metal carving, engraving, and polishing, its double cut grooves deliver smooth, efficient material removal. Compatible with most rotary tools, it offers 10x the lifespan of high-speed steel burrs and comes in a protective storage case for organized, long-lasting use.

Specifications

ASIN	B07S8WRYH4
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#19,433 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #23 in Cutting Burrs
Customer Reviews	4.4 4.4 out of 5 stars (7,150)
Date First Available	May 28, 2019
Item Package Quantity	1
Item Weight	2.08 ounces
Item model number	ML0020
Manufacturer	Lukcase
Material	plastic
Measurement System	Inch
Package Dimensions	5 x 4.21 x 0.67 inches
Part Number	ML0020
Pattern	Double Cut
Shape	Wheel

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5157 som

Duties & taxes included

In stock

Sold byAmazon KyrgyzstanDelivered 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 Kyrgyzstan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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