In alt.home.repair, on Fri, 22 Jan 2021 19:25:30 -0500, micky
wrote:

Many faucets have replaceable seats. If the seats might be ruining your
washers and you can replace the seats, do that. They unscrew with a
flat-blade screwdriver.

No, I was mixed up. Not flat blade. Either the special tool or a hex
wrench, depending on if it needs to be square or hex.