How do you replace an old faucet?

You close the 2 shut off valves below the faucet, remove the pipes going to faucet from both ends. Now you will see the 2 large flat nuts holding the faucet to countertop. These will be easier to remove with a plumbers faucet wrench (about $8 in your hardware store) This has a long shaft and a flat spring loaded head. Remove both nuts and pull faucet out. When you go th get new faucet,also buy braided SS flexible water lines. About $4 each, they are much simpler and better than the cheap grey plastic ones. Re-connect everything opposite order.