Locking Device (200) for connecting a catheter (300) to a Rod (400) of an implantable port (100),Comprising: a Central Axis (260) a Collet sleeve (210) comprises a First End, a Second End (211) (213) a Cylindrical Wall (212) that defines a Central Channel (218) around the Central Axis (260), and the central canal (218) from the first end to the second End (211) (213) Cuff Collet (210)The Cylindrical Wall comprising: a First Recess (214) corresponding to a First Position Locking insert Lock (250) and a Second Recess (216) corresponding to a second positionIon of the insert Lock lockable (250) at least one Tip Elastic (222) protruding Inward from the first End (211) and extends to a portion of the central canal (218)Collet sleeve (210), comprising each of the at least one Tip Elastic (222)A GRIP Surface (225) with the Central Axis (260) and an insert Lock (250) which includes: a First End, a Second End (251) (253) a Cylindrical Wall Defining u (252)N central Channel (258) around the Central Axis (260), and the central canal (258) from the first end to the second End (251) (253) of the insert (250), lockableIn the central Channel (258) of the insert Lock (250) is coaxial with the central Channel (218) Cuff Collet (210) around the Central Axis (260)And a locking tab (257) coupled to the first and second recesses (214216) and the central canal (258) is adapted to receive the catheter (300) and the Actuator (400) of implantable port,In the insert Lock (250) includes a First Locking position defined by the locking tab (257) that engages the first Recess (214) allowing the insert Lock (250) moves freely along the catheter (300) and STEM (400) but to prevent the insert Lock (250) out of the Collet sleeve (210)In the insert and Lock (250) includes a Second Locking position defined by the locking tab (257) that engages the Second Recess (216) so that the Cylindrical Wall (252) of the insert Lock (250) radially compresses the at least one end (222) Cuff Elastic Collet (210) to