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7/64-in 1-5/8-in High-speed steel Countersink Twist Drill Bit

Ratings & Reviews for Kobalt 7/64-in 1-5/8-in High-speed steel Countersink Twist Drill Bit

4.1
389
Review
 4.1 out of 5
390 Reviews


75% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

This adjustable countersink drill bit offers versatility with its 3 interchangeable bits to accommodate a range of screw sizes. The adjustable collar allows users to easily control the depth of the countersink, and the self-centering design helps produce accurate, professional-looking results. However, some users have reported issues with the drill bits breaking or wearing out quickly, especially on harder materials, and the set screws may loosen during use, causing instability. Replacement bits can also be difficult to find. With proper care and maintenance, this tool can be a useful addition for DIY projects and light-duty work.

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

Good quality.

Would Recommend

The right tool for the job.

October 24, 2025
Verified Purchaser
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Not horrible

I like the longer bit but did bend easily.. could use improvement

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Take care when setting set screw.

Bit bent when using set screw for adjustable countersink head.

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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.

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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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