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11/64-in 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit

Ratings & Reviews for Kobalt 11/64-in 4.35mm #8 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 generally well-received for its ability to drill and countersink holes in a single operation. The adjustable collar allows users to easily control the depth of the countersink, which is appreciated for tasks like cabinet and furniture installation. The bit works well on a variety of materials and is reported to produce clean, professional-looking results. However, some users have experienced issues with the bit's durability, with reports of the drill bit breaking or becoming dull more quickly than expected, especially when used on harder materials. Careful use and maintenance appear to be important for getting the best performance from this product.

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

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.

June 26, 2025
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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.

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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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