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9/64-in 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit

Ratings & Reviews for Kobalt 9/64-in 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit

4.1
384
Review
 4.1 out of 5
384 Reviews


75% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The adjustable countersink drill bit is a versatile tool that can accommodate a range of screw sizes and allows for controlled depth adjustment. It works well on softer materials like wood and composites, but the countersink heads may wear out over time. The main strengths are its convenience and ability to drill and countersink in a single operation, making it useful for projects like cabinet and furniture installation. However, some users have reported issues with the drill bit breaking or becoming loose, especially when working with harder materials, and replacement bits can be difficult to find. Careful use and maintenance are recommended for optimal performance.

Customer review summary generated by AI, including incentivized reviews.
384 Customer Reviews

Pre Drilling Holes for Screws

Would Recommend

This drill bit is excellent for pre drilling a hole for screws going through tin and wood to mount vent covers to a wall and for drilling cabinet holes for the knobs or handles and recessing the screw heads as needed. A tool that makes an amateur look like a professional.

July 31, 2025
Verified Purchaser
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Good

Would Recommend

Good

June 30, 2025
From 1_SLASH_8-in 1-5_SLASH_8-in High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Would Not Recommend

Spring housing and tip plunger wobble so badly, the tool is not usable. See my video, and believe the other reviewers!

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very sturdy.

Would Recommend

quality countersink.

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Drill Bit

Worked well in the beginning, but dulled faster than expected

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Poor Quality Product

Would Not Recommend

It broke when drilling the first hole.

December 25, 2024
Verified Purchaser
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Works great !

Would Recommend

Bit

November 25, 2024
From 3_SLASH_16-in 4.75mm #10 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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