This waa a retrofit into a sink with holes drilled for previous two hole faucet. So the holes were drilled in granite cabinet top...The faucet base was too large for the hole just slightly.....it would have been a better fit if there was a little more tolerance for a retrofit. We homeowners and plumbers do not always have a drill capable to drill granite. With the adjustment ring it would not matter if the faucet base had been a bit smaller in diameter.

I had an electric outlet and the installation could have been done in one hour....but because of the the hole size, it was a hassle. 

Good product, works well, does the job. etc. Time will tell the quality of the water heater which seems suspect by other reviews. ?