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.Not intended for hardwoods
Would Not RecommendPoor quality. After using to drill 8 countersinks into ¾" hickory the shank would just fall apart. I went thru multiple bits for 24 holes!
Verified PurchaserVerified Pro
Works very well
Would RecommendI have a full set of these that I am very happy with. They drill well/fast and the counter sink bit also acts as a depth stop. The counter sink bit is held in place with two set screws so, as long as both set screws are properly tightened, the counter sink holds fast and true to the drill bit and the hex shank means no spinning in the chuck and works with a hex driver as well as a drill... I do wish Kobalt would add a different style of counter sink bit, that bored a flat-bottomed hole like a Fo...
From 11_SLASH_64-in 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
I like the tools
Would RecommendI was surprised there was an employee who knew exactly what I was looking for, and actually helped me out.
From 5_SLASH_64-in x 6-in High-speed steel Self-Centering Hinge Bit Verified Purchaser
Broke
Would Not RecommendIt broke almost immediately. I was very Disappointed in the product.
From 11_SLASH_64-in 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser
Improves hinge installation precision
Would RecommendGreatly reduced the time and difficulty in installing a 6' piano hinge
From 5_SLASH_64-in x 6-in High-speed steel Self-Centering Hinge Bit Verified Purchaser
Work Great But
Would RecommendThese really work great but it is easy to brake the bit or when it wares out it is VERY difficult to find replacement bits that are long enought to work in the device. I have 3 of them on my work bnech in just that condition!!
The tip wobbles, making it very difficult to center the drill bit, which is the whole point of the item. Readjusting in the chuck does not help.
From 5_SLASH_64-in x 6-in High-speed steel Self-Centering Hinge Bit Verified Purchaser
2nd One broke
Would RecommendBought One drilled maybe 100-150 holes and then the hex collar started slipping so i returned it got another and the same thing happened
From 3_SLASH_16-in 4.75mm #10 Standard High-speed steel Countersink Twist Drill Bit
Wobbles
Would Not RecommendThe whole purpose is to drill a straight pilot hole, this wobbles when spun. Finish will also rust quickly. You get what you pay for, buy the bosch instead
From 7_SLASH_64-in 6-in High-speed steel Self-Centering Hinge Bit Verified Purchaser
Broke On First Use
Would Not RecommendBroke on first use, so will be returning for refund.
Does not spin straight
Would Not RecommendI tried one of these today. Did not spin straight in the drill nor in the driver. Tried rotating and adjusting everything on the device to no avail. One could describe it as a wobble. It appeared the part locking in the chuck was not in a straight line with the part holding the drill bit. It would have ruined my work had I tried it there. Next try will be with a US made product. It got returned the same day it was purchased.
From 5_SLASH_64-in x 6-in High-speed steel Self-Centering Hinge Bit