Diamond Drill Bits Set, 10 PCS Diamond Hole Saw Set, Glass Drill Bit for Ceramic Tile Porcelain Marble Granite Stone Bottles

I bought these drill bits to add drainage holes to a small collection of ceramic and clay pots that I've accumulated over the years. Some are small - think 2" individual cacti and succulent pots-- a few in the 8-10'" range, and one 16" monster with walls an inch thick. I'm happy to report that all now have cleanly cut drainage holes, and that it took no more than a minute each for all but the big one, which nonetheless took only a few minutes with the one inch bit. It's crucial to follow the two pictographic instructions: 1) Start the hole with the bit at a 45 degree angle to the work surface and once it "bites" return to 90 degrees, and 2) keep the bit wet. When first starting, keep the drill speed low, and use both hands to hold it in place, as the bit will want to walk. I gave these 3 stars in the durability category only because while the 1" bit did its job, it is now completely worn out and in the trash. That said, these are inexpensive, they work just fine for my needs, and I wouldn't hesitate to buy them again.

Why I didn’t think about this before? Would have saved me a ton of trouble. This is now a life changer for sure. Works like a CHARM. I attempted to make holes on ceramic vase with this tool, and it just works wonderfully. Definitely recommended to use running water, set up bit at an angle and slowly drill until you get a purchase. Once you see the indentation, speed up your drill and gently allow the tool to cut. Does a nice smooth job. Very pleased. Took me literally two minutes to make a nice hole.

Great product for the price! Does it job well. I use it to drill holes on vases.

Works great

The great advantage, and only use, of these bits is to cut holes in glass. I use them to drill holes in containers to make transparent orchid pots out of old/cheap glass containers. The thing you need to know is that they require a guide to get started, and you have to keep the bits and surface cool while using them. Guidance is most easily achieved by drilling a hole in a piece of wood first with a conventional bit, then putting the wood on your glass where you want to do the cutting. Further tip, score the glass for one or all holes you're going to drill, then remove the wood guide, and finish the hole without the wood guide in place. Natural tendency is to press a bit, but then your drill hits your guide to fast, and you can break thin glass. To keep the bits cool you can set up a water drip, My preferred method is to drill under water. Put the glass you're drilling in a bucket fill to 1/2 inch or so above your object, and start drilling. Ideally, keep object full of water as well. Drilling rigid materials under water helps to reduce the possibility of cracking.

These drill/annular cutters do work very well. I have used them to drill holes in four different ceramic pots. The ones that I have used cut very well. My only issue with these is the damaged one that was in the package of cutters. It was obviously damaged before the chrome coating was applied. So it is a good product for the money. It works well so far. They just have a QC issue in their manufacturing.

Worked great to make holes in my plant pots, just be patient

These worked great to drill holes in ceramic planters. Good value.

Fast postage and great deal. The bits work really well.

Used to take ikea pots and make drain holes. For this application they worked great!

Brocas de excelente calidad y muy utiles

For $7 you can’t complain! I got these bits so I could drill into an old candle pot that I had been using as a plant pot, but it needed a drainage hole. Went write through with ease, but I recommend sanding it first before drilling so the stone tip bit can grip it!

Great tile cutting bits, start them slow and on a slight angle to get started then straighten bit out to make the hole, small amount of water to keep bits from burning up