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 2 2.5 3 4
Finish Type
Bronze
Material
Cobalt Steel
Shank Type
Straight

🌀Dual Twist Flute - Rapid chip removal & cooler drilling

📐135° Split Point - Self-centering for precision starts

⚙️M35 Cobalt Steel - 5% Cobalt for extreme durability

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Description

🔧 Drill Like a Pro, Finish Like a Boss

VERSATILE METRIC RANGE - 15 essential sizes from 1.5mm to 10mm cover all your metalworking, automotive, and DIY needs with one sleek, organized kit.
RUGGED ON THE GO STORAGE - Heavy-duty indexed ABS case with rubberized corners keeps your bits secure, organized, and ready for any job site hustle.
UNMATCHED HEAT RESISTANCE - Premium M35 cobalt steel composition ensures your bits stay sharp and durable even under intense heat and abrasive conditions.
EFFORTLESS CHIP EVACUATION - Fully ground bits with dual spiral flutes reduce friction and heat buildup, delivering smoother, faster drilling sessions without burnout.
PRECISION ENGINEERED ACCURACY - 135° split point design bites instantly, eliminating wandering and the need for pilot holes—perfect for flawless, professional results every time.

The Hymnorq 15PC 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 with dual twist flutes, these bits offer superior heat resistance and rapid chip removal, making them ideal for drilling tough metals like stainless steel, cast iron, and titanium alloys. The comprehensive metric set (1.5-10mm) comes housed in a rugged, impact-resistant case designed for easy size identification and portability, perfect for professionals and serious DIYers demanding reliability and precision.

Specifications

ASIN	B07B7L6WVY
Best Sellers Rank	#24,570 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #11 in Metalworking & Multipurpose Drill Sets
Brand Name	HYMNORQ
Customer Reviews	4.4 4.4 out of 5 stars (2,527)
Cutting Angle String	135 Degrees
Cutting Diameter	1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 8, 9, 10 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
Model	B07B7L6WVY
Number of Flutes	2
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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€ 49.87

Duties & taxes included

In stock

Sold byAmazon BelgiumDelivered 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 Belgium.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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