Sizes 1,2,3,4,5 are imperil/standard (1/8, 3/16,1/4, 5/16/, 7/16) are the half sizes metric?

Center drills are intended to be used as starter drills before drilling the final hole size. After center punching where you want to drill a specific hole size then use a center drill to start with. They are also used on a metal turning lathe to make a center hole for the live center that holds the stock that is going to be turned. As far as the sizes that is just for reference. I’ve been a machinist for 40 years. These work great for home use to start a hole.

Ok, I have a Unimat mini lathe and there is not enough for regular drill bits, do they make short drill bits the length of these center point drills

There are stubby drill bits you can buy.

Can this be used in reverse to extract a snapped bolt?

No. You need a screw/bolt extractor bit for that.

can these be used in a size 3/8 cordless hand drill?

Probably, but won't work as well as a set of countersinks that are made for a handheld drill. About the same price.

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7 Pieces Center Drill Bits Set, M2 High Speed Steel 60-Degree Angle Center Drill Bits Kit Countersink Tools for Lathe Metalworking Size 1.0 1.5 2.0 2.5 3.0 4.0 5.0

Product ID: 303979084

Details

Cutting Angle String
60 degrees
Cutting Diameter
5 millimeters
Finish Type
Brass
Material
Alloy Steel
Shank Type
Straight

📏7 precision sizes 1.0-5.0mm

🔥M2 High-Speed Steel heat resistant

⚙️60° angle for exact centering

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Description

⚙️ Drill with precision, power, and style—because your projects deserve the best!

BUILT TO LAST - Crafted from premium M2 High-Speed Steel, these bits resist heat and wear for long-lasting performance.
ORGANIZED READY - Comes with a sleek portable case to keep your bits secure and ready—never lose a drill bit again.
ENGINEERED FOR ACCURACY - 60-degree cutting angle ensures flawless center holes and perfect countersinks every time.
UNIVERSAL COMPATIBILITY - Seamlessly works with lathes and most electronic drills on steel, iron, brass, aluminum, and more.
PRECISION IN EVERY DRILL - 7 versatile sizes from 1.0mm to 5.0mm cover all your metalworking needs with pinpoint accuracy.

The 7 Pieces Center Drill Bits Set features M2 High-Speed Steel bits with a precise 60-degree angle, offering seven sizes from 1.0mm to 5.0mm. Designed for metalworking professionals and enthusiasts, this durable set delivers accurate center holes and countersinks across a variety of tough materials. Compatible with lathes and electronic drills, it includes a portable storage case for convenience and organization.

Specifications

Asin	B08ZYXXX1Y
Best Sellers Rank	#24,340 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #15 in Countersink Drill Bits
Brand Name	DKIBBITH
Customer Reviews	4.5 4.5 out of 5 stars (1,804) 4.5 out of 5 stars
Cutting Angle String	60 degrees
Cutting Diameter	5 millimeters
Finish Types	Brass
Item Weight	16 ounces
Manufacturer	DKIBBITH
Material Type	Alloy Steel, Brass, High Speed Steel (HSS)
Minimum Bore Diameter	1 millimeters
Model	DKVVT-002
Number Of Flutes	1
Number Of Pieces	7
Part Number	DKVVT-002
Set Name	7 Pieces Center Drill Bits Set
Shank Type	Straight
Surface Recommendation	Metal
Tool Flute Type	Straight
Unit Count	1 Count

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NT$1366

Duties & taxes included

In stock

Sold byAmazon TaiwanDelivered 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 Taiwan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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