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.

15pc Set | Desertcart China

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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¥408

Duties & taxes included

In stock

Sold byAmazon ChinaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

⚡ Drill Like a Pro, Last Like a Legend

COMPLETE METRIC RANGE - 15 essential sizes from 1.5mm to 10mm cover all your metalworking, automotive, and DIY needs with one versatile set.
COOLER FASTER DRILLING - Fully ground dual-flute design optimizes chip removal and reduces friction, keeping your bits sharper and your projects moving.
PINPOINT ACCURACY EVERY TIME - 135° self-centering split point eliminates walking and pilot holes, ensuring clean, precise drilling from the first touch.
RUGGED ORGANIZED PORTABILITY - Impact-resistant ABS case with rubberized corners and raised size markings keeps your bits secure, visible, and ready for any job site.
CUT THROUGH THE TOUGHEST METALS - M35 cobalt steel with 5% cobalt content delivers unmatched heat resistance and durability for stainless steel, titanium, and cast iron.

The Hymnorq 15-Piece M35 Cobalt Drill Bit Set features premium 5% cobalt high-speed steel for superior heat resistance and wear durability. Its 135° self-centering split point ensures precise, no-walk drilling, while fully ground dual flutes enhance chip removal and reduce heat buildup. This comprehensive metric set (1.5-10mm) is housed in a rugged, impact-resistant ABS case with clear size indexing, making it the ultimate choice for professionals and serious DIYers tackling hard metals and diverse materials.

Specifications

ASIN	B07B7L6WVY
Best Sellers Rank	#32,424 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #23 in Metalworking & Multipurpose Drill Sets
Brand Name	HYMNORQ
Customer Reviews	4.3 4.3 out of 5 stars (408)
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
Item Highlight	135° Self-Centering Split Point Prevents Walking; Fully Ground Dual Flutes Reduce Friction; Rugged ABS Indexed Storage Case
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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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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TrustScore 4.5 | 7,300+ reviews

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¥408

Duties & taxes included

In stock

Sold byAmazon ChinaDelivered 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 China.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.