A lock (1) is described, comprising: a body (2) suitable to define a housing (3) having a longitudinal development direction (L) along an insertion direction (I) of a key (200), said housing (3) comprising a first portion (4) and a second portion (5) mutually adjacent along the longitudinal development direction (L) of the body (2); a first rotor (37) suitable to be rotationally housed within the first portion (4) of said housing (3) of such body (2) about the longitudinal development direction (L) of the body (2), said first rotor (37) being suitable to define a further housing (38); a second rotor (39) comprising a first portion (55) suitable to be rotationally housed within the second portion (5) of said housing (3) of the body (2) about the longitudinal development direction (L) of such body (2), said second rotor (39) comprising a second portion (56) suitable to be rotationally housed within the further housing (38) defined by the first rotor (37) about the longitudinal development direction (L) of such body (2). The second rotor (39), by the insertion of the key (200), is suitable to translate along the longitudinal development direction (L) of the body (2) with respect to the first rotor (37). The second rotor (39), by a first rotation portion of the key (200), is suitable to rotate about the longitudinal development direction (L) of the body (2) with respect to the first rotor (37), to pass from a disengagement position to an engagement position with said first rotor (37). In the engagement position, said first rotor (37) and said second rotor (39), by a second portion of rotation of the key (200), are suitable to integrally translate along the longitudinal development direction (L) of the body (2) to reach an actuating position of the lock (1).

A reprogrammable lock cylinder including a stator, a rotor rotatably mounted in the stator, a tumbler assembly mounted in the rotor and operable to permit rotation of the rotor when a first key is inserted into the rotor, the tumbler assembly having a reprogramming state in which the tumbler assembly is operable to be reprogrammed by a second key to match the second key, and an insert configured to cause the tumbler assembly to adopt the reprogramming state in response to presentation of a magnetic tool to the rotor, and to prevent the tumbler assembly from adopting the reprogramming position in absence of the magnetic tool.