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.Excellent quality
Would RecommendI 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.
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Not for Procelain
Would Not RecommendPurchased 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!
Great deal for small jobs
Would RecommendWorked 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.
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Will Easily Cut Through A Ceramic Sink
Would RecommendI 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.
From 5_SLASH_16-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
mnichols
Would RecommendOnly 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.
From 1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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...
Mnichols
Would RecommendMade cutting the tile very easy. Long lasting diamond saw really helped.
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
A little hard to get started.
Would Recommendi had a little difficulty getting the bit started but once I did it worked fine.
From 5_SLASH_16-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Difficult to use
Would Not Recommendthis 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.
From 1-1_SLASH_4-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
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...
Worth the cost
Would RecommendUse it to cut through many projects and still working great.
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Herculean!
Would RecommendThis Kolbalt Hole Saw does its job! I used it to drill through my granite counter top to add a new soap dispenser and it cut out the whole block perfectly and with little effort. Now know this, it takes some amount of physical force to cut through granite; but this little hole saw is clustered with diamonds at the mouth end to do its job timelessly. It took about 3 to 5 min to make a superb hole cut!! The block of granite was exactly, the same size in depth as the hole saws mouth. You just c...
From 1-3_SLASH_8-in Wet_SLASH_Dry Diamond Core Drill Bit for Stone Verified Purchaser
Works best wet, start slow and at an angle.
Would Not RecommendWorked ok, not amazed. Took a long time to cut tile.
Verified Purchaser
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