I bought this because I needed a custom sized drill bit. 1 1/2" was too small and 1 3/4" was too big specifically for inserting K-cups into the drilled holes. I bought this just before Christmas to finish this coaster as a Christmas gift project. I used it in a drill and it worked well, moving slowly and carefully and waiting for the drill to cool before drilling another hole. As you can see the hole is just the right size for a K cup. I intend to do more of these.