one day, our bath room sink fell off from the granite counter top and broke the pipes underneath, the sounds like a bomb in the house...we found out that the sink was with out clips, just had glue on it ! the contractor' Stellar Construction' out business, the owner won't get back to us... Luckily, we found Impressive Marble & Granite in Brighton MI. Mr. Nick Brown came in our house, put new screws in Granite, and hooked up our sink, also put my plumbing pipes back to work ! we are very satisfied their work, also paid reasonable price.