The diamond hole saw worked well on the first cut. Not sure how many porcelain cuts it can make before it wears out. Time will tell.
Verified purchase: Yes | Condition: New
I knew going into the purchase that this low cost item would not be a high quality product. After watching a video on YouTube on how to use this type of holesaw (the video with the 2-liter bottle used to water cool the holesaw) I drilled 4 wine bottles with my drill press and there was very little chipping at the edge of the holes. So water cool the saw and take your time and you can achieve acceptable results. As to the quality: the shanks are hollow, the diamond grit is unevenly distributed around the cutting edge of the saw (until it has been used a few times in my case)
Verified purchase: Yes | Condition: New
Did not receive diamond drill bits. Instead received a 4pc set of extension bars. Absolutely pissed off, needed these drill bits for a project due next week and now im 9 dollars down and I still have to go buy diamond drill bits
Verified purchase: Yes | Condition: New
These are economical and good enough for small projects. I bought these bits to drill four 1/4" holes in some wall tile. Other than the surface glaze, the wall tiles are actually quite soft. These bits did the job just fine.
Verified purchase: Yes | Condition: New
I used the diamond grit drill bits to drill through a porcelain bottle to make a lamp. The drill bits did the trick without cracking the bottle.
Verified purchase: Yes | Condition: New
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