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.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.
From 1-1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
This is a very good,reliable product by Kobalt .
Would RecommendWorked just like it should. Very satisfied. I highly recommend this product.
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you for the 5-star rating! We appreciate your support and glad you're happy with the product.
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Got it done.
Would RecommendIt was time consuming but did the job!
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
no pilot drill bit. it can jump around when start
Would Recommendworked as intended. ruff to start
From 2-1_SLASH_2-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Not durable
Would RecommendDid not last long enough
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Works great
Would RecommendDrilled through porcelain toilet tank no problem. Zero chips in porcelain when finished
From 5_SLASH_16-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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...

Better than I expected
Great better than I expected
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Junk
Would Not RecommendTried 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
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...

Ceramic Tile Bit cuts like a charm
Would RecommendBit 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.
From 1-1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Cuts a nice smooth hole
Would RecommendThis 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
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Excellent tool
Would RecommendThis 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.
From 1-1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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The price is not that bad
Would RecommendIt works good
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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Poor performance
Would Not RecommendNeed to put in large numbers not to exceed 400 RPM, dulled quickly
From 5_SLASH_16-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Dear Lowe's Customer
Thank you for your feedback. We're sorry our product didn’t meet your expectations. Your input helps us impro...

This is perfect for cutting tile.
Would RecommendProduct did as intended.
Verified Purchaser
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Thank you for the 5-star rating! We appreciate your support and are glad the hole saw worked well for your project.
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