I don't know why but drill bits are so expensive at hardware stores. It's really funny that they charge so much for a hole saw. I found this set and am very happy with it. We have just remodeled our kitchen and added a double oven. We lost space for the microwave and had to move the microwave to the pantry. Our pantry doesn't have an outlet, so I had to run the cord through the wall. I had to drill a hole in wood, plywood and drywall. This hole saw cut all three flawlessly. I ordered a sleeve from Revain to convert a hole in there and this set was the right size to work with the sleeve. I like the case that comes with it. This set is amazing and I highly recommend it if you read my review. I'm so glad I found it.