An intervertebral implant (1,101) extending along a longitudinal direction, comprising; - a first implant body (3,103) which extends along a longitudinal direction of the implant (1,101) and includes a first proximal end (3A,103A) and a first distal end (3B,103B) forming opposite ends of the first implant body (3,103) in longitudinal direction, and a second implant body (5,105) which extends along the longitudinal direction of the implant (1,101) and includes a second proximal end (5A,105A) and a second distal end (5B,105B) forming opposite ends of the second implant body (5,105) in longitudinal direction, where the first implant body (3,103) and the second implant body (5,105) are connected such as to be movable relative to each other along the longitudinal direction; - a threaded member which is seated in the first implant body (3,103) so as to be rotatable along a rotary axis extending in the longitudinal direction of the implant (1, 101) and which has a proximal end that is accessible from the outside of the implant (1, 101), where the proximal end of the threaded member comprises a first interface (17,117) having a design which allows the transmission of a rotary motion about the rotary axis to the threaded member by use of a rotatable tool; and - a thread located in the second implant body (5,105), which thread extends in longitudinal direction of the implant (1, 101) and is arranged such as to cooperate with the treaded member seated in the first implant body (3,103) in a way that the threaded member imparts a longitudinal movement to the second implant body (5,105) relative to the first implant body (3,103) upon rotation of the threaded member about its rotary axis; characterized in that the proximal end of the threaded member further comprises a securing means (23,123) which allows for engagement of a mating securing element of a tool used for transmitting a rotary motion to the threaded member, so as to secure the proximal end from slipping off from the tool in longitudinal direction. - a first implant body (3,103) which extends along a longitudinal direction of the implant (1,101) and includes a first proximal end (3A,103A) and a first distal end (3B,103B) forming opposite ends of the first implant body (3,103) in longitudinal direction, and a second implant body (5,105) which extends along the longitudinal direction of the implant (1,101) and includes a second proximal end (5A,105A) and a second distal end (5B,105B) forming opposite ends of the second implant body (5,105) in longitudinal direction, where the first implant body (3,103) and the second implant body (5,105) are connected such as to be movable relative to each other along the longitudinal direction; - a threaded member which is seated in the first implant body (3,103) so as to be rotatable along a rotary axis extending in the longitudinal direction of the implant (1, 101) and which has a proximal end that is accessible from the outside of the implant (1, 101), where the proximal end of the threaded member comprises a first interface (17,117) having a design which allows the transmission of a rotary motion about the rotary axis to the threaded member by use of a rotatable tool; and - a thread located in the second implant body (5,105), which thread extends in longitudinal direction of the implant (1, 101) and is arranged such as to cooperate with the treaded member seated in the first implant body (3,103) in a way that the threaded member imparts a longitudinal movement to the second implant body (5,105) relative to the first implant body (3,103) upon rotation of the threaded member about its rotary axis;