These keys will help you remove most CACHE aerators. The handy key ring keeps them together and includes one of each size cache aerator key: regular size, junior size, tiny junior or tt size, tom thumb or tt size.
1.5 GPM Insert Replacements Included. One for each size key all in a convenient kit.
Keys included are M24x1 (Regular), M21.5x1 (Junior), M18.5x1 (Tiny Junior) M16.5x1 (Tom Thumb)