I have never used this type of drill bit but the customer required a drilled glazed ceramic pot for drainage. I was very concerned about the cost of the glass. If I had spoiled it I would have eaten the cost of the pot which was hundreds of dollars. I used masking tape on the bottom to keep the bit in place and it worked great! I started at an angle and worked very slowly, but the process went smoothly. Can't wait to try this and other items! The perfect tool for the job!