Package includes: 12 pieces of faucet filter aerators in male 16.5mm, 18.5mm, 21.5mm, and 24mm sizes to meet various faucet size needs. 5 pieces of aerator wrench tools for removing and installing different sizes of faucet aerators. Easy installation: Faucet filter replacements come with wrench tools that allow quick removal and installation within minutes. No plumber required. Installation can be completed in under a minute. Made of high-quality ABS material: Aerator wrench keys are constructed from durable ABS plastic, ensuring strength and long-term use without cracking or breaking. Wide application: Flow restrictor aerators fit kitchen sink faucets, bathroom taps, and lavatory faucet spouts. Compatible with standard threaded faucets and works with brands such as Neoperl, Moen, Kohler, American Standard, Danze, and Grohe. Non-splashing performance: These mixer faucet aerators blend water and air to produce a smooth, bubbly flow while conserving water. Helps prevent splashing and maintains consistent water pressure. Ideal for replacing or cleaning clogged aerators and restoring proper water flow.