What are the shank diameters?

Dear friend Head Diameter *Shank Diameter * Length 6.3MM: 6.3MM*5MM*37MM 8.3MM: 8.3MM*6MM*40MM 10.4MM:10.4MM*6MM*39MM 12.4MM:12.4MM*10MM*46MM 16.5MM:16.5MM*10MM*47MM Any question ,just feel free to tell us Regards Preamer

How do these perform on stainless steel to deburr holes?

They work good in a2,d2, and stainless 304. I have several types, 60, 82, and 90 deg. I don't run a high rpm though. I use these in a hand drill motor and in my mill. Remember start slow, multi blade with light chip depth will give a good finish. They're though enough to champher an edge also, at least occasionally!

What is the correct speed to avoid the chattering that leaves a very poor finish in the countersink?

Try running them at a higher speed and make sure EVERYTHING is as solidly locked down as possible. good luck

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Countersink Drill Bit Set for Steel, 3 Flute 90 Degree HSS Chamfering Tool Bit for Metal Wood Woodworking Metal Working Tool Bit Set, Pack of 6pcs 1/4 1/2

Countersink Drill Bit Set for Steel, 3 Flute 90 Degree HSS Chamfering Tool Bit for Metal Wood Woodworking Metal Working Tool Bit Set, Pack of 6pcs 1/4 1/2

Product ID: 29374403

Details

Cutting Angle String
90 degrees
Cutting Diameter
6.3
Finish Type
Silver
Material
High Speed
Shank Type
Round

📏6 precision sizes from 6.3mm to 20.5mm

🔥HSS 4231 steel for heat & corrosion resistance

⚙️3-flute design for smooth chip removal

819717₫

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Description

🔧 Elevate your craft with precision and power — don’t get left behind!

COMPLETE SIZE RANGE - Six essential sizes included to tackle a wide variety of drilling and chamfering tasks with ease.
DURABLE HIGH SPEED STEEL - Crafted from premium HSS 4231 for superior heat and rust resistance during intense projects.
OPTIMIZED CHIP CLEARANCE - 3-flute design prevents clogging, boosting your workflow efficiency and reducing downtime.
VERSATILE MULTI MATERIAL USE - Perfect for carbon steel, aluminum, wood, PVC, and more—expand your DIY horizons.
EFFORTLESS PRECISION CHAMFERING - 90° countersink angle ensures clean, professional bevels every time.

This 6-piece Countersink Drill Bit Set features a 3-flute, 90° chamfering design made from high-quality HSS 4231 steel, delivering excellent heat and corrosion resistance. Ideal for use on carbon steel, aluminum, wood, and PVC, it offers six popular sizes (6.3mm to 20.5mm) with a round shank for compatibility. Engineered for smooth chip removal and fast, clean countersinking, this set is a must-have for professionals and serious DIYers seeking reliable, efficient metal and woodworking tools.

Specifications

ASIN	B015J33P2M
Best Sellers Rank	#368,771 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #341 in Countersink Drill Bits
Brand Name	Chiloskit
Customer Reviews	4.2 4.2 out of 5 stars (320)
Cutting Angle String	90 degrees
Cutting Diameter	6.3 millimeters
Finish Types	Silver
Item Dimensions	3.94 x 3.94 x 3.94 inches
Item Weight	0.1 kg
Manufacturer	Preamer
Material Type	High Speed Steel (HSS)
Minimum Bore Diameter	0.37 inches
Model	LK-154565
Number of Flutes	3
Number of Packs	1
Number of Pieces	6
Part Number	1
Point Style	Countersink
Set Name	6-Piece Set
Shank Type	Round
Surface Recommendation	Metal
Tool Flute Type	3 Flutes
UPC	745950874485
Unit Count	6 Count

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819717₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered 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 Vietnam.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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