Can these drill bits cut through hardened steel or stainless steel?

Yes. M35 grade steel with 5% Cobalt is specifically engineered for high-tensile metals like stainless steel, cast iron, and titanium alloys. For fully hardened steel (HRC > 50), carbide bits are recommended.

Will these bits fit my standard cordless drill?

Yes. These feature standard round straight shanks. The largest diameter is 6.5mm, allowing them to fit securely into any standard 3/8-inch (10mm) or 1/2-inch (13mm) drill chuck.

Do I need to use cutting oil or lubricant?

Highly recommended. While Cobalt is heat-resistant, using cutting fluid significantly reduces friction and heat buildup. This prevents the bit from annealing (softening) and greatly extends its lifespan.

Do these bits require a center punch to start?

No. These bits feature a 135° Split Point tip. This design is self-centering and cuts immediately upon contact with the metal, preventing the bit from "walking" or skating across the surface.

Are these bits just coated with Cobalt or solid?

They are solid M35 Cobalt steel throughout, not just coated. Unlike titanium-coated bits that lose effectiveness once sharpened, these maintain their heat resistance and performance even after resharpening.

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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13-Piece Cobalt Drill Bit Set with Index Case – M35 Grade (5% Cobalt) Steel, 1.5mm to 6.5mm, Dual Twist Flute, 135° Split Point, Ideal for Hard Metals Like Stainless Steel and Cast Iron

13-Piece Cobalt Drill Bit Set with Index Case – M35 Grade (5% Cobalt) Steel, 1.5mm to 6.5mm, Dual Twist Flute, 135° Split Point, Ideal for Hard Metals Like Stainless Steel and Cast Iron

Product ID: 321471947

Details

Cutting angle string
135 Degrees
Cutting diameter
6.5
Finish type
Bronze
Material
Cobalt Steel
Shank type
Straight

🌀Dual twist flute for efficient chip removal

📏13 precision metric sizes, 1.5mm–6.5mm

⚙️M35 cobalt steel, Rockwell 67 hardness

$51.50

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In stock

Sold byAmazon EcuadorDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔩 Drill Like a Pro, Last Like a Legend

PORTABLE ORGANIZED - Durable indexed case keeps your bits secure and ready for any job, wherever you go.
UNMATCHED DURABILITY - Crafted from M35 cobalt steel with 5% cobalt for up to 12x longer life than standard bits.
COMPLETE METRIC RANGE - 13 drill bits from 1.5mm to 6.5mm cover all your metalworking needs with perfect increments.
PRECISION AT EVERY TURN - 135° split point design ensures self-centering, no walking, and faster penetration on hard metals.
OPTIMIZED CHIP EVACUATION - Dual twist flute geometry removes debris smoothly, reducing heat and extending bit life.

This 13-piece cobalt drill bit set features M35 grade steel with 5% cobalt, delivering exceptional heat resistance and durability. Designed with a 135° split point and dual twist flutes, it offers precision drilling and efficient chip removal across a versatile range of 1.5mm to 6.5mm sizes. Ideal for hard metals like stainless steel and cast iron, the set comes neatly organized in a portable index case, making it the ultimate upgrade for professionals and serious DIYers aiming to elevate their metalworking game.

Specifications

ASIN	B071ZRMWBN
Best Sellers Rank	#43,443 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #20 in Jobber Drill Bits
Brand	HYMNORQ
Brand Name	HYMNORQ
Customer Reviews	4.4 out of 5 stars 2,327 Reviews
Cutting Angle String	135 Degrees
Cutting Diameter	6.5 Millimeters
Cutting angle string	135 Degrees
Cutting diameter	6.5 Millimeters
Finish Types	Bronze
Finish type	Bronze
Included Components	13 pieces of metric cobalt drill bits
Item Dimensions	13 x 1.5 x 7 centimeters
Item Weight	0.1 Kilograms
Manufacturer	Hymnorq
Material	Cobalt Steel
Material Type	Cobalt Steel
Model	DC023
Number of Flutes	2
Number of Pieces	13
Part Number	DC023
Point Style	Split Point
Set Name	13-Piece Cobalt Drill Bit Set
Shank Type	Straight
Shank type	Straight
Surface Recommendation	Stainless Steel, Brass, Copper, Iron, Aluminum Alloy, Angle Steel, Cast Iron, Wood, Plastic
Tool Flute Type	Twist Flute
UPC	610521863130
Unit Count	1 Count

Reviews

D**D

Would highly recommend this product.

High quality products great price.

14.03.2020

H**M

These eat through the metal 👌

These drill bits are fantastic for drilling through the metal so we could put the new metal legs on our outdoor couch

30.01.2026

M**C

quarter of the price and quality is great

13.01.2024

L**C

Qualité correcte

Si j'avais payé le double je serais faché mais bon, pour ce prix, ca me va. Le controle de qualité est plus ou moins efficace mais j'ai un Drill Doctor au pire aller je vais leur donner un petit coup sur la meule. Sinon je n'ai aucunement vérifié l'efficacité ni même le diamètre encore. Le temps me dira

1.02.2023

S**Y

It works!

These drill bits actually work! Drill through car roof rail like hot knife through butter

15.03.2025

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Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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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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$51.50

Duties & taxes included

In stock

Sold byAmazon EcuadorDelivered 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 Ecuador.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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