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Countersink Drill Bit Set, M35 Cobalt HSS Countersink Drill Bits 6 Pieces 1/4 Inch Quick Change Hex Shank for Metal, Wood, Stainless Steel, Carbon Steel

4.9 (8) Write Review
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$28.07

$ 14 .39 $14.39

In Stock

About this item

  • HIGH-QUALITY COBALT MATERIALS -- MATEWORK countersink drill bits are crafted from M35 cobalt high-speed steel, Provide double protection fortified with a cobalt coating for enhanced durability, corrosion resistance, and heat resistance.This guarantees reliable performance, even in demanding applications.
  • EFFICIENT CUTTING DESIGN -- With a five-flute design, these drill bits offer superior stability during cutting and efficient debris discharge. This design extends the blade life, ensures accurate cuts, and speeds up the drilling process.
  • VERSATILE APPLICATIONS -- Includes 5 most popular sizes (1/4", 3/8", 1/2", 5/8", 3/4") and 1 special size 5/16". M35 Cobalt Countersink Drill is suitable for stainless steel, carbon steel, iron, copper, aluminum and most other metals as well as wood, plywood, etc.
  • USER-FRIENDLY DESIGN -- Featuring laser-engraved step sizes, our countersink drill bits ensure clear visibility and durability during use. This design enhances convenience and accuracy, streamlining the drilling process.
  • DEDICATED CUSTOMER SERVICE -- While our products undergo rigorous quality inspections, we understand that unforeseen issues may occur. Rest assured, we are committed to providing professional customer service. If you encounter any quality problems, please contact us via Amazon for prompt assistance and replacement.


Upgrade your drilling arsenal with the MATEWORK Countersink Drill Bit Set. Crafted from premium M35 cobalt high-speed steel, these drill bits offer exceptional durability, corrosion resistance, and heat resistance for long-lasting performance. The fortified cobalt coating provides double protection, ensuring reliable results even in the most demanding applications. With a versatile selection of sizes and a user-friendly design featuring laser-engraved step sizes, these drill bits are perfect for various materials including metal, wood, stainless steel, and more. Elevate your drilling experience with MATEWORK's precision-engineered countersink drill bits.


confident 88
Reviewed in the United States on March 30, 2025
Oh yes I love it very good outstanding I'm a gearhead enjoy wrenching keep shopping Amazon
David L.
Reviewed in Canada on March 28, 2025
Did a good job on stainless steel which had been chewing up standard HSS countersinks. Giving the full 5 stars because it did much better than I expected, to be honest.
Austin
Reviewed in the United States on January 4, 2025
Drilling stainless steel is not easy, these do it with ease! Quality feels okay, theyre not extremely expensive feeling but they dont feel like chinese garbage. Fit into the drill or impact driver without worries. So far durability is good. We have not needed to sharpen or contact for warranty if they have a warranty. They are sharp out of the box. They function as intended. Use your tools for what they are designed for.
Augusto Panecatl
Reviewed in Mexico on January 10, 2025
Aunqie son de cobalto (supuestamente) y cortan relativamente ràpido, el afilado es bastante deficiente, en definitiva es necesario usar otro avellanador de HSS para darle acabado final.
George Borrelli
Reviewed in the United States on August 11, 2024
Fairly decent for the price
Francis Laplante
Reviewed in Canada on July 16, 2024
Juste bon pour fraiser du bois mou. Ce n'est surement pas du M35. La 3/4 glisse sur l'acier doux.
LG
Reviewed in Canada on June 17, 2024
Works really great.
Gary R.
Reviewed in the United States on October 13, 2024
They create a symmetrical taper hole unlike my single flute that I had and the quick change is nice because I can use it in my driver and a bit in my drill and not have to change back and forth. I can change from the counter sink to a screw bit with less hassle than I could with the drill.