High-quality zinc alloy: The aerator key is made from zinc alloy for durability, corrosion resistance, and a long service life. It resists rust and deformation and stays reliable through repeated disassembly and installation. The stronger torque helps prevent the wrench from deforming during extended use. 6-in-1 design: An all-in-one aerator key with six sizes: 16 mm, 18 mm, 20 mm, 22 mm, 24 mm and 28 mm. This covers a wide range of tap aerator sizes and needs. Wide compatibility: Suitable for tap aerators of different materials, brands and eras. The key is highly compatible with various sizes and types found in homes (kitchen, toilet, bathroom) and in public spaces such as hotels and office buildings. Affordable: The 6-in-1 wrench lets you adjust or replace aerators to maintain optimal water flow and reduce water waste. It eliminates the need to buy multiple single-function tools, saving money. This set includes 2 units for added value. Use scenarios: - Home kitchen faucet: remove or adjust the aerator to restore smooth water flow. - Bathroom or toilet faucet maintenance: handle different aerator sizes quickly without swapping tools. - Public facilities (hotels, offices): service multiple sinks with varied aerator sizes using a single 6-in-1 tool.