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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13-Pc M35 Cobalt Metric Drill Bit Set, 1.5-6.5mm for Hard Metals

13-Pc M35 Cobalt Metric Drill Bit Set, 1.5-6.5mm for Hard Metals

Product ID: 45689374

Details

Cutting Angle String
135 degrees
Cutting Diameter
1.5
Finish Type
Bronze
Material
Cobalt Steel
Shank Type
Straight

⚡Dual Twist Flutes - rapid chip ejection, less heat

🎯135° Split Point - self-centers, no walking

🛠️M35 Cobalt Steel - 5% Cobalt for extreme durability

R$201

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Description

🔩 Drill Like a Pro, Finish Like a Boss!

ORGANIZED PORTABLE - Durable indexed case with tilt-out holder keeps your bits sorted and ready for any job, anywhere.
COMPLETE METRIC RANGE - 13 carefully chosen sizes from 1.5mm to 6.5mm, including specialty intermediate bits for exact fits.
EFFORTLESS CHIP REMOVAL - Dual twist flutes rapidly eject debris, reducing friction and heat to extend bit life and maintain clean holes.
PRECISION DRILLING EVERY TIME - 135° split point geometry ensures instant self-centering and eliminates bit walking for flawless starts.
UNMATCHED HARDNESS HEAT RESISTANCE - M35 cobalt alloy delivers up to 67 Rockwell hardness for drilling toughest metals without dulling.

The Hymnorq 13-Pc M35 Cobalt Metric Drill Bit Set features premium 5% cobalt high-speed steel for superior hardness and heat resistance, ideal for drilling hard metals like stainless steel and cast iron. Its 135° split point design prevents walking and ensures precision, while dual twist flutes enable fast chip ejection for clean, efficient drilling. The set includes 13 metric sizes in a durable, labeled case for easy organization and portability.

Specifications

ASIN	B071ZRMWBN
Best Sellers Rank	#18,175 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #13 in Metalworking & Multipurpose Drill Sets
Brand	HYMNORQ
Brand Name	HYMNORQ
Customer Reviews	4.4 out of 5 stars 1,152 Reviews
Cutting Angle String	135 degrees
Cutting Diameter	1.5 millimeters
Finish Type	Bronze
Finish Types	Bronze
Included Components	13 pieces of metric cobalt drill bits
Item Dimensions	5.12 x 0.59 x 2.76 inches
Item Highlight	135° Split Point Prevents Walking; Fast Chip Ejection; Ideal for Stainless Steel & Cast Iron; Includes Indexed Storage Case
Item Weight	0.1 kg
Manufacturer	Hymnorq
Material	Cobalt Steel
Material Type	Cobalt Steel
Model	DC023
Number of Flutes	2
Number of Packs	1
Number of Pieces	13
Part Number	DC023
Point Style	Split Point
Set Name	13pcs(Plastic Case)
Shank Type	Straight
Surface Recommendation	Stainless Steel, Brass, Copper, Iron, Aluminum Alloy, Angle Steel, Cast Iron, Wood, Plastic
Tool Flute Type	Spiral
UPC	610521863130
Unit Count	1 Count
Warranty Description	Seller warranty for 90 days from date of purchase.

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R$201

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered 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 Brazil.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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