Aerators are designed to cut down on unnecessary water consumption (washing hands, brushing teeth, shaving etc.) from your taps. An aerator serves the following purposes: - prevent splashing - shaping the water stream coming out of the faucet spout - saving water and reducing energy costs - reducing faucet noise Faucet aerators are often used in homes with low water pressure in order to increase the perceived water pressure. Screwed by a special key (included) - without it you cannot unscrew the aerator. Ideal for public places or places frequently visited by guests. - M24mm Male Anti-Theft Tap Aerator - All high quality made in EU - Material: Stainless Chromed Brass - Anti-Theft - with installation key - Reducing water usage up to 50%