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Cobalt Steel Single End Countersink Drill Bit with Cobalt Coating Finish for Hard Metal Wood, 90 Degree M35 HSS, 8MM Round Shank, 14MM Body Diameter

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$17.99

$ 8 .99 $8.99

In Stock

1.Size:10-15mm


About this item

  • M35 Cobalt HSS: Super tough, resistant to wear, high thermal threshold. Designed for tackling tough materials like stainless steel and other high-performance alloys. Please ensure sufficient lubrication and cooling in extensive uses.
  • Cobalt coating helps with wear and thermal. Please be reminded that the countersinking performance will not be impacted even if coatings are worn down. The wear and tear of coating is normal and the performance relies on hardness of the countersink bit itself.
  • PRO compatibility for professional machinist and DIY enthusiasts: Round shank can be fitted with hand drills and bench drills. We recommend using bench drills for optimal results when working with hard alloys.
  • The spiral flutes prevent chips from clogging, making your work more efficient.
  • 90 degree cutting angle, countersinks 5 - 10 mm.



Product Description

1

*Reminder*

Please be reminded that the cutting tips are 90 degree throughout.

There might be packaging printing error that states as 82 degree cutting tip, which is INCORRECT.

We are sorry for the inconvenience caused.

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Conelrad
2025-08-29 18:53:17
This unusual tool has outlasted two traditional tools, and just keeps on working.
Omar A.
2025-08-23 12:40:36
Muy bueno
Luke
2025-07-09 10:56:33
Works great on mild steel and high carbon steel. Has not dulled after repeated use. Will buy again for sure.Just haven’t needed to as it hasn’t worn out.
K. Bunker
2025-06-23 14:45:21
People who use countersink bits a lot will tell you that this type -- variously known as zero-flute or cross-hole or Weldon style countersink bit (and more rarely called a single end countersink bit, as the sellers here do) -- is generally better than the fluted style of countersink bit. In both wood and metals, the zero-flute bit is more likely to give you a smooth circular conical hole, while the multi-flute type can chatter and leave a bumpy, out-of-round cone.That said, without doing extensive scientific comparison tests I can't tell you how good this particular zero-flute countersink bit is in terms of holding its edge over long use. It's definitely sharp and cuts well out of the box though, and it seems good.
DRP27410
2025-06-16 11:04:09
Had never used a countersink of this design. It works well even on plywood which I did not expect. I had assumed the grain direction on the multiple layers of birch plywood would cause splintering but the cut was very smooth.Be careful when opening packaging. I almost threw it away because it was packaged in a larger box with other items along with stuffing paper. The packaging caused the bit to disappear. Glad I always try to double check.
Ralph C.
2025-06-09 09:50:29
Produced a clean, accurate countersink in hard wood. I expect that this countersink will last a long time in my woodshop since its primary purpose is to create countersinks in metal work. I can't rate its durability or longevity, only time will tell me these things. I would like it in 82-degree countersink to complement my woodworking but it's not critical since my projects are now intended to be used for in shop use only.
Gumby
2025-06-05 16:07:58
Worked very well
Michael D.
2025-05-03 15:25:30
Works well on aluminum producing a continuos curl and a very smooth finish. Don't know yet how well it will hold up in the long run. I think it would be difficult to resharpen.
Conelrad
2025-03-21 12:10:36
This unusual tool has outlasted two traditional tools, and just keeps on working.
Omar A.
2025-03-13 10:07:07
Muy bueno
Luke
2025-02-26 14:06:43
Works great on mild steel and high carbon steel. Has not dulled after repeated use. Will buy again for sure.Just haven’t needed to as it hasn’t worn out.
K. Bunker
2025-02-07 20:19:06
People who use countersink bits a lot will tell you that this type -- variously known as zero-flute or cross-hole or Weldon style countersink bit (and more rarely called a single end countersink bit, as the sellers here do) -- is generally better than the fluted style of countersink bit. In both wood and metals, the zero-flute bit is more likely to give you a smooth circular conical hole, while the multi-flute type can chatter and leave a bumpy, out-of-round cone.That said, without doing extensive scientific comparison tests I can't tell you how good this particular zero-flute countersink bit is in terms of holding its edge over long use. It's definitely sharp and cuts well out of the box though, and it seems good.
DRP27410
2024-12-25 14:03:28
Had never used a countersink of this design. It works well even on plywood which I did not expect. I had assumed the grain direction on the multiple layers of birch plywood would cause splintering but the cut was very smooth.Be careful when opening packaging. I almost threw it away because it was packaged in a larger box with other items along with stuffing paper. The packaging caused the bit to disappear. Glad I always try to double check.
Ralph C.
2024-12-09 13:10:26
Produced a clean, accurate countersink in hard wood. I expect that this countersink will last a long time in my woodshop since its primary purpose is to create countersinks in metal work. I can't rate its durability or longevity, only time will tell me these things. I would like it in 82-degree countersink to complement my woodworking but it's not critical since my projects are now intended to be used for in shop use only.
Gumby
2024-12-06 20:59:16
Worked very well
Michael D.
2024-11-15 11:16:32
Works well on aluminum producing a continuos curl and a very smooth finish. Don't know yet how well it will hold up in the long run. I think it would be difficult to resharpen.
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