Are these good for make holes in steel material?

Yes，good for drilling steel.Generally, sellers purchase products from the market and sell them on e-commerce platforms. The STROTON drill bits we sell are designed and produced by our factory, including the case, which is unique on the market. This drill bit contains 6% cobalt, which is higher than general products. In addition, STROTON hss drill bits have a secret heat treatment recipe.So They’re good at drilling steel.

Where are these made?

They are made in China. They are very good cobalt drill bits set.It is designed and manufactured by STROTON, different from the similar products in the market.

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

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Cobalt Drill Bit Set (1/16-1/2 Inch, 17PCS), M35 High Speed Steel Twist Drill Bits for Stainless Steel, Hard Metal, Cast Iron, Plastic and Wood

Product ID: 436854092

Details

Cutting angle string
135 Degrees
Cutting diameter
0.5 Inches
Finish type
High Speed
Material
Cobalt
Shank type
(1/16-7/32:

🔥68 HRC Rockwell Hardness for superior heat resistance

⏱️Runs 2-3x faster than standard drill bits

⚙️5% Premium Cobalt Steel for extreme durability

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₩112587

Duties & taxes included

In stock

Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Drill Like a Pro, Last Like a Legend

PRO TIPS INCLUDED - Optimized RPM guidelines and lubrication hacks for stainless steel mastery
COST EFFECTIVE LONGEVITY - Drill more holes with fewer bit changes—lowest cost per hole in its class
VERSATILE 17 PIECE RANGE - From 1/16 to 1/2 inch, perfect for metals, plastics, and wood
PRECISION SPLIT POINT TIP - Starts drilling instantly with zero walking for flawless accuracy
UNMATCHED HEAT WEAR RESISTANCE - 5% cobalt alloy keeps bits cooler and sharper under pressure

The Cobalt Drill Bit Set features 17 precision-engineered bits made from premium 5% cobalt high-speed steel, delivering exceptional hardness (68 HRC) and heat resistance. Designed for professional-grade drilling through stainless steel, hardened metals, plastics, and wood, these bits run 2-3 times faster than standard sets, ensuring longer tool life and superior performance. Ideal for millennial managers who demand efficiency and reliability in their toolkit.

Specifications

ASIN	B09MRW8399
ASIN	B09MRW8399
Best Sellers Rank	#163,204 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #666 in Power Drill Bit Sets
Brand Name	STROTON
Customer Reviews	4.5 4.5 out of 5 stars (519)
Customer reviews	4.5 4.5 out of 5 stars (519)
Cutting Angle String	135 Degrees
Cutting Diameter	0.5 Inches
Date First Available	24 April 2022
Finish Types	High Speed Steel,Stainless Steel
Item Dimensions	18 x 13 x 4 centimeters
Item model number	Cobalt 6 series bits inch 1/16-1/2
Manufacturer	STROTON Ltd
Manufacturer	STROTON Ltd
Material Type	Cobalt
Minimum Bore Diameter	0.06 Inches
Model	Cobalt 6 series bits inch 1/16-1/2
Number of Flutes	2
Number of Pieces	17
Part Number	Cobalt 6 series bits inch 1/16-1/2
Point Style	Split Point
Product Dimensions	18 x 13 x 4 cm; 516 g
Set Name	17-Piece Set
Shank Type	(1/16-7/32: Round Shank) (1/4-1/2: 3-Flat Shank)
Surface Recommendation	Metal, Plastic, Wood
Tool Flute Type	Spiral
UPC	643459994935
Unit Count	1 Count

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TrustScore 4.5 | 7,300+ reviews

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The product exactly matches the description. Very satisfied with my purchase.

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Smooth transaction and product arrived in perfect condition.

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