Most kitchen faucets nowadays come in the form of a single-hole faucet. However, kitchen faucets can have up to 4 holes. As a rule of thumb, if you have a single-hole faucet, you’ll be able to install it on any sink, whether it has 1, 3, or even 4 holes but you’ll need to buy an extra deck plate to cover up these holes. On the other hand, if you have a single hole sink, you won’t be able to install 3 and 4 holes faucets, which is why single hole faucets are the best for compatibility with all kinds of sinks and spares you the hassle of finding out whether the faucet is suitable for your sink.