Package includes: 12 pieces of faucet filter aerators in sizes 16.5mm, 18.5mm, 21.5mm, and 24mm to meet various faucet size requirements. 5 pieces of aerator wrench tools for removing and installing different sizes of faucet aerators. Easy installation: Faucet aerator replacement comes with wrench tools that allow quick removal and installation within minutes. No plumber required. Installation can be completed in under 1 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 faucets, and lavatory faucet spouts. Compatible with standard threaded faucets and common brands including Moen, Kohler, American Standard, Danze, and Grohe. Non-splashing performance: These faucet aerators mix water and air to produce a smooth, bubbly flow while conserving water and minimizing splashing. Helps maintain water pressure and improves flow performance. Ideal for replacing or cleaning clogged aerators to restore proper water flow.