Hose guide mounting brackets.
Ceramic disk valve.
The ceramic discs also protect the metal of the valve from erosion.
This means that you aren t screwing the handle into a washer every time you use the faucet.
The older style of faucet needs two full turns of the handle to activate the flow but low friction ceramic valves allow the faucet to operate with just a quarter turn of the handle.
Ceramic disc valving is an innovative water control system found in each american standard faucet.