Package includes: 12 pieces of faucet filter aerators in sizes 16.5mm, 18.5mm, 21.5mm, and 24mm to meet various faucet size needs. 5 pieces of aerator wrench tools for removing and installing different sizes of faucet aerators. Easy installation: Faucet aerator replacements come with wrench tools that allow you to complete removal and installation in minutes. No need to hire a plumber. Can be done in under 1 minute. Made of high-quality ABS material: Aerator wrench keys are made of durable ABS plastic, strong and sturdy. Long-lasting and resistant to breakage. Wide application: Flow restrictor faucet aerators can be fitted to kitchen sink faucets, bathroom taps, and lavatory faucet spouts. Compatible with Neoperl, Moen, Kohler, American Standard, Danze, and Grohe aerators. Non-splashing: These mixer faucet aerators mix water and air effectively to create a steady stream of bubbles while restricting water flow without reducing pressure. Helps prevent water splashing and conserves water. Ideal tool set for replacing or cleaning clogged aerators, effectively fixing low-flow issues and restoring smooth water flow.