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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
379
Review
 4.1 out of 5
382 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.
382 Customer Reviews

Good quality bit.

Would Recommend

Good bit. Works well. Stays sharp.

June 22, 2026
From 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Good

Would Recommend

Works like it should

June 22, 2026
From 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Just a bit

Would Recommend

Makes a nice clean counter sink hole.

June 3, 2026
From 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Good to have

Would Recommend

This is the size I use most frequently, so I’m glad to buy it individually.

May 15, 2026
From 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Works well. This is the one you wanted.

Would Recommend

No dislikes

May 9, 2026
From 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Nice bot

Works liked planned

May 7, 2026
From 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Great tool

Would Recommend

Works great

April 28, 2026
Verified Purchaser
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Speed and Precision.

Would Recommend

Bit has a good point for precise drilling. Fast starting, bit cleans well. Would be nice to have a stop on the countersink.

April 26, 2026
From 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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Countersink

Would Recommend

Stocking up on drill bits for upcoming project and needed the countersink. Product is great.

April 23, 2026
From 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
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