The invention relates to a mechanism used for wall socket, comprising a bottom. Ganged prods and earthing tie-in module are arranged in the hollow inside of the mechanism and allow the mechanism immediately to use for ''two polar'', ''France'', ''schuko'' or''UPS'' type of socket structure. The mechanism comprises a plurality of hand grabs which can actuate and can be used for fixing the mechanism into a position where the mechanism will be inserted; a plurality of lug bosses which is used for positioning and fixing metal fixing plate on the corner of the mechanism. For changing the structure which is used, via turning fixing plate for 180 degree to position the fixing plate in different distance from body is necessary. All is benefit from the following fact: by means of a part of an exteriority of a stepped plate which is emclosing inner perimeter of flanged on two heights of flanged, the plate is arranged on lateral supporting of the lug boss.