If you work in construction these are the ones you need.
These items are so easy to use, they are very easy to use with a little water. I'm a plumber and the one for a 2" hole will work with a 1 1/2" pipe due to the OD. I will buy others for 2" pipe and 3" pipe, they work so well
Pros
. Wide application: for porcelain stoneware, granite, marble, stone, masonry, brick (we only need 3-5 working days to ship from China).