Bar for connecting the two cylinders halves of a variable-length double cylinder lock

A bar for connecting two cylinder halves of a variable-length double locking cylinder, comprising:

• a middle part comprising:
• two arms which can respectively be inserted into a recess of the housing of one of the two cylinder halves, each arm having a plurality of boreholes for the reception of fastening pins, said plurality of boreholes all extending in the same direction through said middle part perpendicular to the longitudinal direction of said bar,
• a thickened part arranged between the arms and to which the cylinder halves can be applied,
• wherein the bar further comprises at least one extension part, and
• wherein the middle part has at least two connecting lugs, said lugs forming a second end of each of said arms, each lug having a borehole,
• wherein the extension part has a protrusion possessing a borehole which can be inserted between the connecting lugs for connection of the middle part to the extension part,
• wherein said borehole of the protrusion extends in the same direction as said plurality of boreholes in the middle part, and
• wherein said extension part comprises, opposite to the protrusion, at least two connecting lugs which are configured substantially the same as the connecting lugs of the middle part.