Ratings & Reviews for Kobalt Diamond Core Drill Bit 2-1/2-in Dry Diamond Core Drill Bit for Stone
Ratings may include incentivized customer reviews.
What Customers Are Saying
Customers praise the drill bit's exceptional performance on ceramic, porcelain, and glass tile, reporting clean, chip-free cuts and efficient drilling. Most users highlight durability and minimal wear after multiple holes, though success depends on proper technique—starting at 45 degrees, using low RPMs, and continuous wetting significantly improves results. Some reviewers experienced bit bending or premature dulling, often attributing failures to improper handling rather than defects. Overall, most consider it highly effective for hard surfaces when used correctly.
Customer review summary generated by AI, including incentivized reviews.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
From Diamond Core Drill Bit 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone
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 Diamond Core Drill Bit 1-1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you so much for your feedback! We appreciate your business.
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 Diamond Core Drill Bit 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you so much for your feedback! We appreciate your business.
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 Diamond Core Drill Bit 1-1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you so much for your feedback! We appreciate your business.
The price is not that bad
Would RecommendIt works good
From Diamond Core Drill Bit 1-3_SLASH_8-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you so much for your feedback! We appreciate your business.
Poor performance
Would Not RecommendNeed to put in large numbers not to exceed 400 RPM, dulled quickly
From Diamond Core Drill Bit 5_SLASH_16-in 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... Read More
This is perfect for cutting tile.
Would RecommendProduct did as intended.
From Diamond Core Drill Bit 1-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you so much for your feedback! We appreciate your business.
It will not work!!
Would Not RecommendIt done nothing!! DO NOT BUY IT!!
From Diamond Core Drill Bit 1_SLASH_4-in 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 improve. Please ... Read More
structural failure
Would Not Recommend10 seconds into drilling and the bit collapsed/twisted
From Diamond Core Drill Bit 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Dear LOWE’S Customer
We are sorry to hear that you had trouble with your hole. We would like to discuss the situation you had and assist you wit... Read More
Kobalt tile bit
Would Not RecommendDoes not last very long and is weak.
From Diamond Core Drill Bit 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Dear LOWE’S Customer
We would like to discuss the details of your project and assist you with a solution. Please feel free to give us a call at ... Read More
Diamond hole saw
Would RecommendI like this product.
From Diamond Core Drill Bit 1-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Not good for porcelain tiles
Would Not RecommendFrom Diamond Core Drill Bit 1-1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Dear LOWE’S Customer
We are sorry to hear that you had trouble with your blade. We would like to discuss the situation you had and assist you wi... Read More
Failed little bit
The hollow bit got hot and twisted. First time I used it.
From Diamond Core Drill Bit 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Hi Lowe's Customer
We are sorry to hear that you had trouble with your hole saw. We would like to discuss the situation you had and assist y... Read More
Only able to drill 2 holes
Would Not RecommendThe bit had poor quality did not last
From Diamond Core Drill Bit 5_SLASH_16-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Hi Lowe's Customer
We are sorry to hear that you had trouble with your hole saw. We would like to discuss the situation you had and assist y... Read More
Worked...then broke
Would Not RecommendNeeded a 1/4" bit to anchor a kitchen island to a tile floor. This bit was challenging to work with, took A LOT of time to actually drill through the tile and only worked for 6 holes until it just twisted in the drill. I've done this before in a shower but with a different bit and different size. Saw this bit at Lowe's and thought I'd give it shot. Quality just isn't there like the other brand of bit and certainly didn't last nearly as long as it should have.
Pretty good bit
Would RecommendI had 12- 1/4 holes to drill in porcelain tile. I drilled 6 completely with this bit and decided to just start the remaining 6 after it heated up some and twisted a little. No big deal.. I'll just swap out to the new Spyder for the last 6. Well, the Spyder only lasted 4 1/2 holes. So I ended up going back to the Kobalt to finish the job. Even though it was a little twisted. I made it work. All was drilled with water. Low to medium speed with some pressure using my corded Dewalt drill.
From Diamond Core Drill Bit 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone
Glass and Ceramic drill bit. Poor Quality for a bi
Would Not RecommendThe bit was recommended by the employee in the window department. No matter what I did the bit just ground itself down smooth
From Diamond Core Drill Bit 5_SLASH_16-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
We would love to know some details on the project you were working on. What tool were you using? How thick was the material, were you using it dry o... Read More
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... Read More