[Package Contents] You will receive 1 faucet aerator wrench, equipped with 4 different thread sizes: M20, M22, M24, M28. It allows you to effortlessly switch between different aerator sizes, ensuring a versatile and convenient experience. [Perfect Tool] With the use of this faucet wrench, you can install an aerator that generates a bubble effect, increasing water conservation. The aerator contributes to water filtration, maintains a constant flow rate, and offers an adjustable flow rate. [Quality Material] Made from high-quality plastic, the faucet strainer wrench makes it easy to replace the aerator without scratches. Maintenance Tip: To prevent bacteria buildup and limescale while optimizing flow, it is recommended to replace your faucet aerator at least every six months. [Wide Application] Practical and user-friendly, this faucet strainer insert wrench is applicable to most household faucets. It works well with bathroom faucets, kitchen faucets, lavatory faucets, and outdoor faucets, facilitating easy aerator replacement and adding convenience to daily use.