3 otters 15PCS Diamond Hole Saw Kit, Glass Drill Bits for Drilling Holes in Glass, Bottles, Marble, Granite Stone, Tile Cutting 0.24 Inch - 2 Inch（6mm - 50mm

Works well drilling china …they are heavy duty and easily drills through china

Great tools works great cuts good

Work as advertised!KEEP THEM WET when drilling!

Honestly, these work better than I expected for such a cheap price. I haven’t used them all but I’ve used most of them, and they have all worked. I’m tickled pink with these bargain buy.

Had to return item it did not last more than one hole on my countertop.

My wife had a few clay pots without drainage holes. She asked if I could pot holes in those pots. After a little research and watching some YouTube videos I decided to take on the challenge. I purchased this set because of the price and amount of pieces. First I practiced on a small clay pot then moved on to a much larger pot. It worked! No breaks! I’m glad I purchased this set and acquired a new skill. I would certainly recommend the product…

These were so cheaply made the material on the cutting heads wasn’t even consistent — just bare metal in spots.Not worth it. Use another brand. Bad quality.

Clearly these aren't meant to be the highest quality tile hole saws judging by the price. I was not expecting a lot from them, as I only needed to cut a few holes.I was very much surprised!These did a great job on my tiles. I noticed a little chipping on the 7th hole I cut (in picture), but it will be covered by the escutcheon.The bits show some loss of diamond coating after use, but they are still usable (29mm bit was used, 25mm is new in picture).I'd never used a hole saw on tile before, and I found that if I clamped a piece of wood or tile with the the proper size hole in it over the top of my tile, I didn't have a problem with the saw walking away as others have noted.