I am remodeling a kitchen and when installing our new Ikea porcelain sink, the sink only had one faucet hole and I needed a second for our RO. I checked large boxes locally and there were more single hole saws than this entire set. I found a review of this set in action on YouTube and decided to give it a try. Wow, I was impressed! It drilled through the china like butter, I drilled through the sink in 3 minutes, the hole is the perfect size, just be safe and use water when drilling.