The product is beautifully made in every way except that it has no diamonds on the tip, especially on the inner bevel. Lots of diamonds on the side. I asked the seller if this is correct but got no response. I then used it and seriously regretted not buying anything else because it took about 30 minutes to go an inch and required constant tilt which resulted in dangerous holds and yes it was with water. If you look closely at the photo you will see that there are very few diamonds on the bevel. I had a plumber friend who looked at this and didn't get it either. Fix it and it will be a good product.