The SDC 442UB is an exit switch with a 1.5" red mushroom button on a double gang faceplate. The unit features a momentary DPST contact and a stainless steel finish. The conspicuous 440 heavy duty industrial series switch assemblies incorporates a 2.62'' Dia mushroom button and heavy duty weather resistant contacts. The large 2 gang mushroom assembly incudes a heavy duty steel bezel around the button to guard against abuse. When utilized as an Exit or REX switch, the assembly is easy to activate and stands out for persons without prior knowledge of egress operation.