Review on Durable Diamond Drilling Tools: Perfect for Cutting Granite, Porcelain, and Bathroom Tiles by Loren Jacobson

I had a glazed ceramic pot with no drainage hole and used the largest of the three drill bits. I took my time and used a little splash of water every now and then to cool it down a bit. I didn't use tape or guide to start the hole like some other reviews suggested. The drill wanted to wander at first but just stabilized the drill and all went well. Drilling a hole with this drill took only a few minutes and our plant is happy with the now well-drained pot. I look forward to using all three bits for similar tasks. Very satisfied and the price was great for such a set of diamond drills. Delivery was fast.