Users of this product said
I just need a cup of water to cool off, and my drills can't make use of the tiny bits.
I got about 5 inches drilling from this, which is exactly 9 half inch holes. It is the worst when you are in the middle of a project and need to stop and make a trip to the hardware store.
I was terrified of putting a shelf in our shower because of the tile, but I decided to use these after reading the reviews.
I was not sure if they would cut through the tile but they did and I am not disappointed so far.
I use the smallest one to drill into concrete and it works great, it's cooled off every few seconds with water.