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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

Q: 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

Q: 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!

Q: 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

Product ID: 29374403

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Details

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

🔥HSS 4231 heat & corrosion resistant

⏱️One-piece design for chip-free efficiency

⚙️90° precision chamfering

Frequently Bought Together

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

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Countersink Drill Bit Set, 5pc, 1/4" Hex Shank, 82 Degree Countersink Holes for Screws to Sit Flush or Under The Surface of Metal Wood Plastic, Sizes 1/4, 3/8, 1/2, 5/8, 3/4 Inches with Storage Case

Description

⚡ Drill Like a Pro, Finish Like a Boss!

BUILT TO LAST - Crafted from premium HSS 4231 for superior heat, rust, and corrosion resistance.
WORK WITHOUT PAUSE - One-piece bit design prevents clogging, boosting your workflow speed.
PRECISION PERFECTED - 90° three-flute design ensures flawless chamfering on steel and wood.
VERSATILE SIZE RANGE - Six essential sizes from 1/4" to 1/2" cover all your metal and woodworking needs.
EFFORTLESS CHAMFERING - Automatic through-hole cutting trims both sides in seconds—no hand drill needed.

This 6-piece countersink drill bit set features 90° three-flute HSS 4231 bits designed for efficient, clog-free chamfering on metals and wood. Ideal for workpieces under 45HRC, it offers heat and corrosion resistance with six versatile sizes, delivering professional-grade precision and durability for your DIY or metalworking projects.

Have a Question? See What Others Asked

What are the shank diameters?

do these come only in metric or is imperial available as well?

How do these perform on stainless steel to deburr holes?

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

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