This is a replacement mini toggle switch used to turn the light bulbs on and off on mid to late 1990s THD Hot Plate Attenuators with three toggle switches. This will not work on the earlier Hot Plates with only two toggles switches or later ones with three rocker switches.

This switch will only work in the "Light Bulbs" position, not the "Bright" or "Deep" positions.

It was made in the USA by C&K Switches.