Name: Kobalt 7/64-in 1-5/8-in High-speed steel Countersink Twist Drill Bit
Brand: Kobalt
SKU: 1208447
Price: 8.98 USD
Availability: InStock
Rating: 4.1 (388 reviews)

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Shipping Details

General
Material	High-speed steel	Type	Countersink
Package Quantity	1	Shank Type	Round

Dimensions
Maximum Drilling Depth	1-1/2-in	Shank Size	1/4-in
Bit Diameter (Inches)	7/64-in	Bit Length	1-5/8-in

Features
Heavy Duty	Yes	Set/Individual	Individual
Right/Left Hand	Right handed	Tip Geometry	118-degree split-point

Compatibility
For Use on Fiberglass	Yes	For Use on PVC	Yes
For Use on Metal	No	For Use on Stainless Steel	No
For Use on Wood	Yes	Compatible Tool	Drills/Impact drivers

Warranty
Warranty	None

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -

Miscellaneous
UNSPSC	20121600

Check out the Best Selling Twist Drill Bits on Lowes.com

Review

4.1 out of 5

388 Reviews

75% Recommend this product

Ratings may include incentivized customer reviews.

Read All Reviews

+ 9

What Customers Are Saying

This adjustable countersink drill bit offers versatility with its 3 interchangeable bits to accommodate a range of screw sizes. The adjustable collar allows users to easily control the depth of the countersink, and the self-centering design helps produce accurate, professional-looking results. However, some users have reported issues with the drill bits breaking or wearing out quickly, especially on harder materials, and the set screws may loosen during use, causing instability. Replacement bits can also be difficult to find. With proper care and maintenance, this tool can be a useful addition for DIY projects and light-duty work.

Customer review summary generated by AI, including incentivized reviews.

388 Customer Reviews

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Would Recommend

Its fine. Works well, but a bit overpriced. Can find similar suitable bits online. Not fancy brands, but they will do the trick.

Noname4uAugust 14, 2026
From 9_SLASH_64-in 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser

Was this Review Helpful ?

Good quality bit.

Would Recommend

Good bit. Works well. Stays sharp.

Ken CJune 22, 2026
From 9_SLASH_64-in 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser

Was this Review Helpful ?

Good

Would Recommend

Works like it should

NoclueJune 22, 2026
From 11_SLASH_64-in 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser

Was this Review Helpful ?

Just a bit

Would Recommend

Makes a nice clean counter sink hole.

Rob LowesJune 3, 2026
From 9_SLASH_64-in 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit Verified Purchaser

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11 Questions

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How do you adjust it?

Anyone know the diameter of the shell head for this item?

Hex doesn't hold well in my DeWalt driver chuck. When I'm finished drilling and go to pull back out, the hex pops out of the chuck. Anyone else?

What size hole does the countersink make

Where do i get replacement bits

Kobalt: Featured Videos

COMPARE PRODUCTS

		Name	Current Item Kobalt7/64-in 1-5/8-in High-speed steel Countersink Twist Drill Bit
		Ratings	388
		Bit Diameter (Inches)	7/64-in
		Material	High-speed steel
		For Use on Metal
DEWALT13/64-in 4-in Titanium nitride coated HSS Jobber length Twist Drill Bit	Kobalt7/64-in #8 1-5/8-in High-speed steel Countersink Twist Drill Bit	Kobalt3 -Piece Assorted High-speed steel Countersink Twist Drill Bit Set	EZARC Countersink Drill Bit Set 15 PCS Tapered Drill Bits Counter Sink Drill Bit with 2PCS Wood Plug Cutter 1/4-in Hex Shank Quick Change for Woodworking with Storage Box	DEWALTBLACK GOLD 5 -Piece Assorted High-speed steel Countersink Twist Drill Bit Set	Kobalt9/64-in 3.55mm #6 Standard High-speed steel Countersink Twist Drill Bit	Kobalt11/64-in 4.35mm #8 Standard High-speed steel Countersink Twist Drill Bit	DEWALTBLACK GOLD 3/8-in 1-3/5-in High-speed steel Countersink Twist Drill Bit	Kobalt3/16-in 4.75mm #10 Standard High-speed steel Countersink Twist Drill Bit
574	190	244	6	80	388	388	16	388
13/64-in	7/64-in	Assorted	Assorted	Assorted	9/64-in	11/64-in	3/8-in	3/16-in
Titanium nitride coated HSS	High-speed steel	High-speed steel	High-speed steel	High-speed steel	High-speed steel	High-speed steel	High-speed steel	High-speed steel