(0.16 Inch - 1.18 Inch(4 mm - 30 mm)) - 12 Pcs Diamond Drill Bits for Ceramic, Diamond Hole Saw Drill Bit Set Kit, Glass Drill Bit for Bottles, Pots, Marble, Granite Stone, Tile Cuttin...

Wanted to try using this diamond drill bit on a ceramic bowl which is much cheaper and better quality than most planters being sold.We flipped the bowl over so we have access to the underside. Added a small layer of water on it before we started drilling at about a 45 degree angle. It slips a lot so I had another person holding the bowl steady while I had both hands on the drill. One to keep it from slipping so easily and the other to keep it steady applying light pressure. Started drilling slowly but didn't have much of an effect so I had to add some speed gradually before we created an indentation. Once there was an indent, I just put the drill vertical so it can drill a hole straight through. Again, started off slowly and gradually increased the speed also making sure we have enough water. Was able to get the hole drilled through. Not perfect but can't complain.Didn't really keep track of time, but it probably took us 2-3 minutes to do this. The drill bit looks a little bit worn after this so not sure how many more times we can use this drill bit.

I recently tried the Diamond Hole Saw Drill Bits Set Kit for ceramic and glass, and I’m really impressed with its performance! This kit includes a variety of sizes, making it versatile for different projects, from drilling through glass bottles to creating holes in ceramic pots.The diamond coating on the bits is effective, allowing for clean and precise cuts. I found that the bits easily cut through both glass and ceramic without chipping, which was a pleasant surprise. Just remember to use water to keep the bits cool, as this significantly improves their performance and longevity.The kit comes in a handy storage case, making it easy to keep everything organized. My only minor complaint is that the instructions could be clearer for beginners, especially regarding the best drilling techniques. Overall, though, this set is an excellent investment for anyone looking to work with glass or ceramics. Highly recommended!Please note - You can't force these types of bits or they will burn out. You need to let the bit do its job. i went thru porcelain pretty easy

Remodeling a bathroom, I needed to drill through tile. Thank God for google converting metric to fractions. No issue with getting through the tile. Worked great, just wish I had noticed that they were metric

Understand that these are all in metric sizes and this purchase was for the smaller sized bits. There are many sizes to choose from in this kit, from I think 3mm or 1/8 inch equivalent up to I think 24mm or like 7/8 inch. The sizes are laser etched on the shafts and are a little difficult to see, but the holes that they make are relatively smooth rather than just a sharp edge. The reason is that the bits are simply metal tubes that have one end dipped with metal covered crushed industrial diamond, much like sprinkles on an ice cream cone. With this said they are not lab quality sized bits, and have some cutting surface disparity due to the various sizes of chunks around the end, and this disparity will create a more rounded or smoother edge on the hole that you cut through the glass. Start out slow and at an angle with just the weight of the bit against the glass, and spin the bit against the glass until a little edge develops (I used a rechargeable drill), then add a few drops of water and start to reduce the angle and the edge starts forming a circle on the glass. Slow and steady wins the race!! This is glass, and super tiny pieces of glass are now being broken off of what ever you are drilling through so wear a mask, and have a removable work space that you can just wipe and clump up into a ball and throw away, like some damp newspaper that the wet paper will keep the super tiny glass fragments/shards from blowing away and you can just crumple up and throw away the mess with minimum wiping. With this set I managed to drill a 1/2 inch hole in the side of an aquarium for a water overflow, on one of those 2 1/2 gallon rectangle super thin glass aquariums with the black plastic frame, that still had some fish in it (do not recommend this). The hole was a success, the fitting has been installed and still the aquarium has fish in it (that suspect nothing.) Slow and Steady, listen to the screeching of the bit against the glass, if too much screeching you are either too fast or pushing too much. Slow down, add a few drops of water, and then continue on until you start to see the point where the water starts running down the glass on the other side, then slowly continue on until you have a hole drilled through whatever it was you were drilling. Note: I do not know what it would do to tempered glass, from what I know this would probably shatter any tempered glass the instant the bit scratched the surface. My use with these bits has been just plate glass and bottles. Good luck.

These diamond bits are awesome. I’ve used them on glass and ceramic. They cut smooth and clean. You could use them for crafts, home repair, automotive repair and many other uses. The main thing I like about the diamond bits is the price. Wow! I definitely recommend this product.