Handle comprising at least one main body (1) which is suitable to be fastened to a vehicle door and is provided with a seat (2) for at least one secondary body (3) which can contain the lock of this door, wherein a locking member (5) can rotate in the main body (1) around a first axis (A) for preventing the sliding of the secondary body (3) in the seat (2) by means of a ring (6) provided with a central opening (7) in which a functional portion (8) of the secondary body (3) can be inserted, wherein the locking member (5) is provided with an extension (12) comprising a socket (13) shaped for being coupled with the head (14) of at least one tool (15) for pulling and/or pushing the extension (12), so as to rotate the locking member (5). The present invention also relates to a tool and processes for assembling or disassembling said handle.