The AML21BBA2AA is a single-pole double-throw (SPDT) snap-in panel-mount electronic control Pushbutton Manual Switch with standard square non-lighted housing, black bezel, quick connect/solder terminals, OFF-(ON) function and momentary action. The MICRO SWITCH? AML series unlighted pushbutton is designed to enhance manual operation with a flexible and attractive interface. Snap-in surface products are easy to apply, operate and maintain.