aerator aerator key/aerator spanner 1.ABS material 2.good quality for long time use 3.single and useful with good price Sanliv Faucet Aerator Tool or Faucet Aerator Spanner* Color: greyFunction: opening and assembling faucet aerators from a faucet when you clean up the rust and jam.* it can be used for M22/M24 water outlet. aerator