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 10mm, 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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15PC SET

Product ID: 63712875

Details

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

🌀Dual Flutes - Fully ground for friction reduction

🎯135° Split Point - Self-centering, no walking

⚙️M35 Cobalt Steel - 5% Cobalt for extreme durability

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Description

🔧 Drill Like a Pro, Finish Like a Boss!

CUT THROUGH ANYTHING - Premium M35 cobalt steel ensures unmatched heat resistance and wear durability for drilling stainless steel, titanium, and cast iron.
COMPLETE METRIC RANGE - 15 essential sizes from 1.5mm to 10mm cover all your metalworking, automotive, and DIY needs with one versatile set.
COOL SMOOTH DRILLING - Fully ground dual-flute design rapidly removes chips and reduces heat buildup for longer bit life and cleaner holes.
PINPOINT PRECISION EVERY TIME - 135° self-centering split point eliminates walking and pilot holes, delivering flawless starts on every project.
RUGGED ORGANIZATION ON THE GO - Impact-resistant ABS case with rubberized corners and raised size markings keeps your bits secure, organized, and job-site ready.

The Hymnorq 15-Piece M35 Cobalt Drill Bit Set features premium 5% cobalt high-speed steel bits with a precision 135° split point for self-centering accuracy. Fully ground dual flutes reduce friction and heat, extending bit life while delivering clean, precise holes. This metric set covers 1.5mm to 10mm sizes, housed in a rugged ABS case with clear indexing, making it the ultimate toolkit upgrade for professionals and serious DIYers tackling hard metals and diverse materials.

Specifications

ASIN	B07B7L6WVY
Best Sellers Rank	#24,812 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #16 in Metalworking & Multipurpose Drill Sets
Brand Name	HYMNORQ
Customer Reviews	4.3 4.3 out of 5 stars (401)
Cutting Angle String	135 degrees
Cutting Diameter	1.5 millimeters
Finish Types	Bronze
Included Components	15 pieces of metric cobalt drill bits
Item Dimensions	5.91 x 4.33 x 1.57 inches
Manufacturer	Hymnorq
Material Type	Cobalt Steel
Minimum Bore Diameter	1.5 millimeters
Model	B07B7L6WVY
Number of Flutes	2
Number of Packs	1
Number of Pieces	15
Part Number	B07B7L6WVY
Point Style	Split Point
Set Name	15PC Set
Shank Type	Straight
Surface Recommendation	Stainless Steel, Brass, Copper, Iron, Aluminum Alloy, Angle Steel, Cast Iron, Wood, Plastic
Tool Flute Type	Spiral
UPC	666389162076
Unit Count	1 Count

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53780CFA

Duties & taxes included

In stock

Sold byAmazon CameroonDelivered 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 Cameroon.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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