These work pretty well as a general bit set for drilling most metals? Is applying oil generally needed on a surface when drilling?

While in trade school many decades ago, they taught us to use cooling for chisels and drill bits, I did dry drilling many times throughout the years, it works; however, cooling will extend the life of the drill bit for sure. One online resource said the following: If you don't cool, the material will harden and the drilling will get tougher. With special cutting oil, you cool both the material and the drill. This makes the drilling faster and more effective. The drill bits also last longer, because they stay sharp. Hope that this answers your question.

Are cobalt bits better than titanium bits?

Yes. Cobalt is harder and can drill through harder materials such as stainless steel.

Is the entire bit comprised of the M35 5% cobalt alloy or is the high cobalt steel just on the surfaces?

The entire bit is comprised of the M35 5% cobalt alloy. That is why they should last longer.

Will this fit in a standard household drill?

Our goal is to provide our customers with the highest quality and service. Yes this M35 HSS Drill Bit will fit just be mindful that this is a straight shank bit.

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

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GMTOOLS 13Pcs Cobalt Drill Bits Set, M35 HSS 135 Degree Tip, Twist Jobber Length Drill Bit Kit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Storage Case 1/16"-1/4"

GMTOOLS 13Pcs Cobalt Drill Bits Set, M35 HSS 135 Degree Tip, Twist Jobber Length Drill Bit Kit for Hardened Metal, Cast Iron, Stainless Steel, Plastic and Wood with Storage Case 1/16"-1/4"

Product ID: 469337353

Details

Cutting angle string
135 Degrees
Cutting diameter
6.35
Finish type
Titanium
Material
High Carbon
Shank type
Straight

🔩135° Split Point - fast, precise penetration

🧰13-Piece Set - versatile sizes 1/16" to 1/4"

⚙️M35 Cobalt Alloy - 5% Cobalt for max durability

R$239

Duties & taxes included

In stock

Sold byAmazon BrazilDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Drill Like a Pro, Finish Like a Boss!

EFFORTLESS CHIP REMOVAL - Twist design optimizes chip clearance, reducing friction and speeding up your workflow.
ORGANIZED READY TO GO - Compact, durable storage case keeps your bits secure and accessible—never lose a bit on the job.
VERSATILE 13 PIECE RANGE - From delicate plastics to stainless steel, this set covers all your drilling needs with sizes from 1/16" to 1/4".
UNMATCHED DURABILITY WITH M 35 COBALT - Enhanced 5% cobalt high-speed steel resists wear and heat, perfect for hardened metals and tough materials.
PRECISION ENGINEERED FOR PROFESSIONALS - 135° split point ensures quick, centered drilling with minimal walking for flawless results every time.

The GMTOOLS 13Pcs Cobalt Drill Bits Set features industrial-grade M35 high-speed steel with 5% cobalt for superior wear resistance. Its 135° split point design enables fast, precise drilling with reduced walking, while the twist flutes ensure efficient chip removal. This versatile set includes 13 sizes from 1/16" to 1/4", suitable for hardened metals, stainless steel, plastics, and wood, all housed in a convenient storage case for professional-grade performance and organization.

Specifications

ASIN	B0B5R8P9ST
Best Sellers Rank	#208,439 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #895 in Power Drill Bit Sets
Brand	GMTOOLS
Brand Name	GMTOOLS
Customer Reviews	4.4 out of 5 stars 2,326 Reviews
Cutting Angle String	135 Degrees
Cutting Diameter	6.35 Millimeters
Cutting angle string	135 Degrees
Cutting diameter	6.35 Millimeters
Finish Types	Titanium
Finish type	Titanium
Included Components	1
Manufacturer	GMTOOLS
Material	High Carbon Steel
Material Type	High Carbon Steel
Number of Flutes	2
Number of Pieces	13
Part Number	Cobalt Twist Drill Bit
Point Style	Split Point
Set Name	13Pcs Cobalt Drill Bits Set
Shank Type	Straight
Shank type	Straight
Surface Recommendation	Metal
Tool Flute Type	Spiral
Unit Count	1.0 Count

Reviews

J**E

Great product

These bit are most excellent and cut very fast. I will rebuy from this seller just for the quality and quick delivery

6.05.2026

E**O

EXELENTES

Increíblemente buenas, un excelente filo las e probado en aceros tratados y sin problema perforan, recomendado al 100%

23.08.2025

R**G

Sharp

I didn’t realize my old drill bits were so dull until I got these. Work well.

17.06.2026

A**R

Très bel ensemble ...

Très beau produit, hâte de l'essayer !!!

24.04.2026

G**S

Tough tough tough!!!

I would give them more stars if I could. I have 2 drill sets and broke 3 drill bits trying to drill a hole. Came across this set and ordered it. 1 bit, multiple holes and it still cuts like it was new. Would strongly recommend them if you are looking for something that will last.

27.06.2026

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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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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Great experience from order to delivery. Highly recommended!

1 week ago

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

5 days ago

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R$239

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

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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