Ratings & Reviews for Kobalt 9/64-in 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit
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.Broke on 3rd hole
Would Not RecommendI drilled 2 holes in a board and on the third hole, the hex shank spun off the bit and made it worthless. I was very disappointed as I only bought one and had to drive 30 minutes one way to get a different brand. This delayed my project which was frustrating.
From 3_SLASH_16-in 4.75mm #10 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
Poor quality
Would Not RecommendThis bit strips out where the hex shaft and bit attach and comes apart. The tip breaks easily as well. Other brands I have used don't do that.
Reasonably priced and works right.
Would RecommendInexpensive self centering 5/64 drill bit. Great for pre-drilling a flat head small wood screw.
From 5_SLASH_64-in x 6-in High-speed steel Self-Centering Hinge Bit Verified Purchaser
All 7 pcs are defected. They will trembling when using. Your website can only upload picture, but I have one video on hand if you want to see it for reference. Also, it's not friendly for the return. Cannot get any label or barcode till over ten times try.
From 5_SLASH_64-in x 6-in High-speed steel Self-Centering Hinge Bit Verified PurchaserVerified Pro
Check screw drill recommendations
Would RecommendI should have had a smaller dia bit for the drawer glides screws. Bit depth a little short. Fair price
From 7_SLASH_64-in 6-in High-speed steel Self-Centering Hinge Bit Verified Purchaser
It works but...
Would Not RecommendThe spring in this is so strong that it's difficult to push down while holding the bit and part in position. It wants to move the piece you are drilling the hole for and that defeats the purpose of a self-centering bit.
From 5_SLASH_64-in x 6-in High-speed steel Self-Centering Hinge Bit Verified Purchaser
Works with some modifications…
Would Not RecommendFirst the hex Chuck adapter came off; fortunately it still works without it. Then the tip of the bit broke off. I was able to grind the point down so it still works. Only saving grace is that you can swap the countersink part over to another bit.
Verified Pro
Nice set for almost any size screw
Would RecommendWhat I like: 3 bits to accommodate most typical screw sizes, Adjustable collar to adjust depth of plunge, Replaceable bits, Affordable price. What I don't like: Countersink heads do wear out, and work best on softer woods and composites.
From 7_SLASH_64-in 1-5_SLASH_8-in High-speed steel Countersink Twist Drill Bit Verified PurchaserVerified Pro