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.drill bit
works just fine, drills hole in ceramic
works
Would Recommendworks
From 1-1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
It works
Thanks for the 5-star rating! We appreciate your feedback!
Fit my smaller size drill motor
Would RecommendConstructed to bore through tile flooring
Verified Purchaser
Thanks for the 5-star rating! We appreciate your feedback!
Test on a scrap piece first
Would RecommendGreat product
Thank you for the 5-star rating! We appreciate your support and are glad the product worked well for your project.
Paid more $ for something better that was not.
Would Not RecommendUsed for 6 holes and on the 7th the bit twisted in half and broke. Drilling Lowe’s ceramic tile made by Allen + Roth. A masonry bit finished my job.
From 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you for your review, and we're sorry to hear about your experience. That definitely shouldn’t happen, especially after such light use. This... Read More
damaged boards
Would Recommendthe rock board are delivered damaged
Hi Frank sorry about your experience but this review is for rock boards and the item is for a diamond hole saw.
What a piece of junk
Would Not RecommendWould not cut into material at all. Totally useless
Thank you for sharing your feedback. We’re sorry to hear about your experience while using our hole saw. Although our product is designed to cut/dril... Read More
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 Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you for the 5-star rating! We appreciate your support and are glad the hole saw worked well for your project.
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 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.
Got it done.
Would RecommendIt was time consuming but did the job!
no pilot drill bit. it can jump around when start
Would Recommendworked as intended. ruff to start
Verified Purchaser
Not durable
Would RecommendDid not last long enough
From 1_SLASH_4-in 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
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... Read More
Better than I expected
Great better than I expected
From 1_SLASH_4-in Dry Diamond Core Drill Bit for Stone Verified Purchaser
Thank you so much for your feedback! We appreciate your business.
Thanks for the 5-star rating! We appreciate your feedback!