A device (10) for selective and progressive locking of metal containers (18) to be submitted to mechanical deformations along an extended part of side surface and provided at the bottom by a notch (20), the device having: a circular plan support (12) with an end forming a housing mouthpiece (14) of a containing body (16); a shaped and mobile ring (22) eventually cooperating with an annular seal or membrane (24) placed at the mouthpiece wherein the containers (18) are inserted starting from their respective bottom. A centering collar (26) defines the mouthpiece wherein the containers (18) are inserted and which surrounds the seal (24); a centering ring (30) whose anterior front is directed towards the containers (18) presents a complementary arrangement to the containers themselves bottom periphery and provided with a plurality of through holes; a pusher (32) tensioned by an helical spring (34), placed along the device longitudinal axis (10); means apt to realize a perfect adherence with the container (18) bottom provided with a notch (20).