Rotary locking cylinder for a safety lock

A rotary locking cylinder for a safety lock, comprising:

• a first housing;
• at least one rotor (8) having a key channel (27);
• a driver (6) engaged around the at least one rotor (8) and having tumblers which rotationally release the at least one rotor (8) with a corresponding key (17), wherein the rotor (8) and driver (6) are both engaged within the first housing (5);
• wherein the first housing forms an active part (2) of the rotary locking cylinder and has a first end and a second end facing away from the driver (6);
• a second housing (14) having a rotatable insert (9) forming a first extension element (3);
• wherein the first extension element (3) is fixed on the active part (2) a distance apart from the driver (6) on the first end of the active part (2) and a key shank of the corresponding key is extended substantially corresponding to a length (A) of the first extension element (3);
• wherein the rotatable insert (9) of the first extension element (3) extends out from the first end of the rotor (8);
• and
• wherein the second housing (14) of the first extension element (3) also extends out from the first end of the first housing (5).