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5/16-in Wet/Dry Diamond Core Drill Bit for Stone

Ratings & Reviews for Kobalt 5/16-in Wet/Dry Diamond Core Drill Bit for Stone

3.9
196
Review
 3.9 out of 5
196 Reviews


69% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The diamond-tipped ceramic drill bit generally performs well for drilling holes in ceramic, porcelain, and glass materials, though it requires some technique to use effectively. Many found starting the hole at an angle and using water to keep the bit cool helped produce clean, chip-free holes. However, some reported issues with the bit wandering, wearing down quickly, or struggling with thicker or harder materials. The bit seems to work best for lighter-duty applications when used with care, but may not be suitable for more demanding tasks. Proper technique and patience are key to getting good results.

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

Return process was easy

Would Recommend

Never actually used the product, I found my old one

December 30, 2022
Verified Purchaser
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Buy extra bits when drilling tile!

Would Recommend

As I mentioned in my review of the larger size bit this design was able to accomplish (with a lot of time) what my carbide bit failed at (again not sure if I used it incorrectly or it was the wrong tool for the job). Partly I was very cautious as I didn't have the time to risk ruining my only other bit and have to run to the store and get more bits (and honestly they should be able to make more than 1 or 2 holes before wearing out). But ultimately this bit got the job done with enough patience...

December 28, 2022
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Go slow and use water

Would Recommend

I was glad that I bought this bit along with the carbide ones because the carbide ones started out great but in the end I had to use the diamond bit to finish the holes. I did go slow and use some water both to cool the bit and clear out the hole as I went. These seemed to take longer to drill but ultimately got the job done.

December 28, 2022
Verified Purchaser
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Great product

Would Recommend

High quality and a great product, I would recommend this product

December 28, 2022
From 1-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Excellent quality

Would Recommend

I used another brand of this same drill bit and this drill bit was far superior as it did not become dull after drilling the same amount of holes through tile.

December 26, 2022
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Not for Procelain

Would Not Recommend

Purchased the 5/16 bit on 12/3/22. After 3 holes it was no good. Thought maybe that one was just defective so I purchased another; same result. Purchased 3 in total and only got 9 holes done. Where is the quality control. Don't sell it for Procelain if it only cuts glass and ceramic. I'm so disappointed! $5 plus per hole...ridiculous!

December 4, 2022
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Response from Team Kobalt

Dear LOWE’S Customer,
We would love to know some details you experienced to evaluate the rating you provided. Please give us a call at 833-514-...

Team KobaltSeptember 12, 2023

Kobalt-Lowes

Great deal for small jobs

Would Recommend

Worked pretty well. Seemed like it was gradually wearing down after about 6 cuts, but that's all the use I needed to get out of it, and it was 1/3 the price of some of the other brands.

November 22, 2022
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Will Easily Cut Through A Ceramic Sink

Would Recommend

I needed it to open up the slot in the top of my old bathroom sink for the new faucet drain handle. My regular metal files wouldn't touch the ceramic basin but this thing easily cut through 1/2" of solid ceramic with ease. I used a small amount of water to keep it cool and help clear the dust and it worked as advertised.

November 17, 2022
Verified Purchaser
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mnichols

Would Recommend

Only cut 2 holes and it was shot. I definitely wouldn’t recommend this product. I’ve tried HD and Habor Freight bits and honestly they must all be made by the same company. Not recommended.

November 15, 2022
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

We would love to know some details on the material you were cutting so that we can better understand why our hole saw did not perform to your standar...

Team KobaltNovember 22, 2022

Kobalt-Lowes

Mnichols

Would Recommend

Made cutting the tile very easy. Long lasting diamond saw really helped.

November 15, 2022
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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A little hard to get started.

Would Recommend

i had a little difficulty getting the bit started but once I did it worked fine.

November 12, 2022
Verified Purchaser
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Difficult to use

Would Not Recommend

this is a very hard bit for DIY'rs to use. there is no center drill which allows the drill to just skate across the tile. A small center drill would be most helpful to guide. I realized that in order to use you must use angle the bit and gradually turn it up straight. Most will find this difficult to use.

October 30, 2022
From 1-1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

We would love to know some details on the material you were cutting so that we can better understand why our hole saw did not perform to your standar...

Team KobaltNovember 22, 2022

Kobalt-Lowes

Worth the cost

Would Recommend

Use it to cut through many projects and still working great.

September 21, 2022
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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