Abstract: Consisting of a casing (1), affixed to the supporting ring (56), equipped with an external operating key (16), whose hollow interior features interchangeable sets of contacts (22, 23, 24, 30, 32 and 34), in order to fulfil the following applications: single-pole switch, illuminated single-pole switch, single-pole switch with pilot light, bell-push, illuminated bell-push, two-way switch, illuminated two-way switch, two-way switch with pilot light, double-pole switch, double-pole switch with pilot light, crossover switch and illuminated crossover switch. The casing.(1), when it houses four contacts, features four lateral mounts (2), and for two or three contacts, three mounts (2). The rocker (13) transmits the pressure exerted on the key (16) to a swinging contact (21), and furthermore features two pivots (18) in the embodiment with two swinging contacts (21) and a single pivot (18) in that of a single swinging contact (21).