Schneider Electric, Harmony, ZB4BJ2, Black Selector Switch Head Ø22, 2 position stay put

Amazon

Progress with confidence designed for industry Flexibility and a robust construction An ingenious locking system consisting of a snap-fit head and body, tightened with a single screw, ensures easy yet secure mounting

Radwell UK

SELECTOR SWITCH: 2 POSITIONS, MAINTAINED (MA), BLACK HANDLE (MOQ=1, PKG QTY=1)