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

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

4.1
384
Review
 4.1 out of 5
385 Reviews


75% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The adjustable countersink drill bit offers versatility with 3 different bit sizes to accommodate a range of screw sizes. The adjustable collar allows for easy control of the countersink depth, creating a professional-looking finish. Many users found it to be a time-saver, allowing them to drill and countersink in a single step. However, the drill bit can be prone to breaking or wearing out prematurely, especially on harder materials. Some users also experienced issues with the bit becoming loose or wobbly during use, affecting accuracy. Careful use and consideration of the bit's limitations are advised.

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

Great little countersink

Would Recommend

Did exactly what I needed it to do!

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Poor quality don’t waste money

Would Not Recommend
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Great product

Would Recommend

Works great

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Great product!

Would Recommend

Does the job great!

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Works great

Would Not Recommend

Great product

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Unusable

Would Not Recommend

Bought the 5/16 and 7/16. Both of them had high run out (The Bits Wobble) the 5/16 worse than the 7/16. Checked my Chuck and It’s fine

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solid tool

Would Not Recommend

works beautifully.

February 5, 2026
Verified Purchaser
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Works as intended.

Would Recommend

It works as intended, even without the quick change adapter.

January 22, 2026
Verified Purchaser
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Great countersink drill bit

Would Recommend

Great drill bit. Allowed me to countersink my screws easily

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Good quality.

Would Recommend

The right tool for the job.

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Not horrible

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

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