Danco Multi-Use Faucet Aerator Key is a versatile tool designed for easy removal or installation of faucet aerators. Over time, aerators can become clogged with mineral deposits, affecting water flow. This aerator key features an aerator wrench for both internal and external threads, along with four different-sized keys suitable for most faucet brands. Unlike traditional tools that may scratch or damage faucet housing, Danco's Aerator Key ensures a non-abrasive and straightforward process for maintaining or replacing aerators, promoting efficient water flow without compromising the integrity of the faucet. Model Number: 10909