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1-in Wet/Dry Diamond Core Drill Bit for Stone

Ratings & Reviews for Kobalt 1-in Wet/Dry Diamond Core Drill Bit for Stone

3.9
190
Review
 3.9 out of 5
190 Reviews


69% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

This diamond-coated drill bit performs well for drilling holes in ceramic, glass, and tile materials, but requires careful technique. It works best with water to keep the bit cool and clear debris, though dry drilling is more difficult and can cause faster wear. The bit can be challenging to start and keep steady, especially on smooth surfaces, but using a jig or angling the bit initially can help. The bit's durability varies, with some customers reporting multiple uses and others finding it wore out or bent after just a few uses, particularly on thicker or harder materials. Overall, with the right technique and patience, this diamond bit can create clean, chip-free holes in a variety of ceramic and tile surfaces, though for more demanding applications, a higher-quality bit may be required.

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

Great product!

When Milwaukee couldn’t do the job Kobalt sure did! Cut through 2 in island to install soap dispenser. Worked like a charm.

February 14, 2025
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

Thank you for the 5-star rating! We appreciate your support and are glad the hole saw worked well for your project. Read More

Team KobaltJanuary 29, 2026

Kobalt-Lowes

This is a very good,reliable product by Kobalt .

Would Recommend

Worked just like it should. Very satisfied. I highly recommend this product.

February 8, 2025
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

Thank you for the 5-star rating! We appreciate your support and glad you're happy with the product. Read More

Team KobaltJanuary 29, 2026

Kobalt-Lowes

Got it done.

Would Recommend

It was time consuming but did the job!

February 1, 2025
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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no pilot drill bit. it can jump around when start

Would Recommend

worked as intended. ruff to start

January 18, 2025
From 2-1_SLASH_2-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Not durable

Would Recommend

Did not last long enough

November 27, 2024
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Works great

Would Recommend

Drilled through porcelain toilet tank no problem. Zero chips in porcelain when finished

October 4, 2024
From 5_SLASH_16-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

Thank you so much for your feedback! We're thrilled to hear that our product performed so well for you, especially on such a delicate material li...

Team KobaltOctober 8, 2024

Kobalt-Lowes

Better than I expected

Great better than I expected

September 25, 2024
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

Thank you so much for your feedback! We appreciate your business. ...</p><button class=Read More

Team KobaltOctober 8, 2024

Kobalt-Lowes

Junk

Would Not Recommend

Tried to drill a hole in tile. The bit was burnt out before drilling 1/4 tile hole. $19 down the drain and I have 6 more holes to drill

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Response from Team Kobalt

Dear Lowe's Customer, Thank you for your feedback. I'm sorry to hear that our product did not meet your expectations. We want to ensure our p...

Team KobaltOctober 8, 2024

Kobalt-Lowes

Ceramic Tile Bit cuts like a charm

Would Recommend

Bit created a nice clean hole in the tiles, including edge cuts that ran off of the tile. There was no significant chipping and the bit didn't noticeably try to pull the workpiece out of my hand as it started to cut. Job quality earned a 5-star rating. The lost star was due to the waste being hard to remove from the bit after the cut was complete. Finished DIY job looked professional. Perfect size to hide holes but work on plumbing in the future.

September 13, 2024
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

Thank you so much for your feedback! We appreciate your business. ...</p><button class=Read More

Team KobaltOctober 8, 2024

Kobalt-Lowes

Cuts a nice smooth hole

Would Recommend

This cutter performs better when water is added, it will also cut dry. Will need to cut a hole with a drill bit in some scrap wood otherwise this bit will wonder all over and then clamp it to the tile piece for easier drilling

September 9, 2024
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

Thank you so much for your feedback! We appreciate your business. ...</p><button class=Read More

Team KobaltOctober 8, 2024

Kobalt-Lowes

Excellent tool

Would Recommend

This was perfect for cutting the openings for the shower and tub copper tubes in ceramic tile on a shower install. Just make a wood template to hold it in place, clamp it, and use some water to keep it cool. Worked perfectly for two cuts. IDK how it would hold up over frequent use, but well worth the price.

August 25, 2024
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

Thank you so much for your feedback! We appreciate your business. ...</p><button class=Read More

Team KobaltOctober 8, 2024

Kobalt-Lowes

The price is not that bad

Would Recommend

It works good

July 13, 2024
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

Thank you so much for your feedback! We appreciate your business. ...</p><button class=Read More

Team KobaltOctober 8, 2024

Kobalt-Lowes

Poor performance

Would Not Recommend

Need to put in large numbers not to exceed 400 RPM, dulled quickly

July 7, 2024
From 5_SLASH_16-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Response from Team Kobalt

Dear Lowe's Customer

Thank you for your feedback. We're sorry our product didn’t meet your expectations. Your input helps us impro...

Team KobaltAugust 12, 2024

Kobalt-Lowes

This is perfect for cutting tile.

Would Recommend

Product did as intended.

July 7, 2024
Verified Purchaser
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Response from Team Kobalt

Thank you so much for your feedback! We appreciate your business. ...</p><button class=Read More

Team KobaltOctober 8, 2024

Kobalt-Lowes