An electrosurgical forceps for sealing tissue, comprising: a housing; an elongated at least partially flexible shaft extending distally from the housing, the elongated shaft having an axis A-A defined therethrough; first and second jaw members (1110, 1120) attached to a distal end of the elongated shaft, each jaw member including an electrically conductive tissue contacting surface (112,122) adapted to connect to a source of electrosurgical energy such that the electrically conductive tissue contacting surfaces are capable of conducting electrosurgical energy through tissue held therebetween; a drive rod extending at least partially through the elongated shaft, the drive rod operatively coupled to at least one of the first and second jaw members such that reciprocation of the drive rod in an axial direction with respect to the axis A-A induces the first and second jaw members to move between a first position in spaced relation to one another and a second position closer to one another for engaging tissue; a drive assembly disposed in the housing and operatively mounted to a handle operatively coupled to the drive rod to induce reciprocation of the drive rod in the axial direction such that said handle is operable to move the first and second jaw members between the first and second positions; and characterised by the drive rod being flexible; and a fine adjustment assembly coupled to the drive rod to finely adjust the opening of the jaw members relative to one another prior to final assembly, the fine adjustment assembly comprising an adjustment knob disposed about the axis A-A and an adapter connected to the drive rod, the adapter being threaded at a distal end thereof to threadably engage the adjustment knob such that rotational motion imparted to the adjustment knob adjusts the length of the drive rod relative to the drive assembly thereby allowing the separation distance of the jaw members to be accurately and finely controlled. a housing; an elongated at least partially flexible shaft extending distally from the housing, the elongated shaft having an axis A-A defined therethrough; first and second jaw members (1110, 1120) attached to a distal end of the elongated shaft, each jaw member including an electrically conductive tissue contacting surface (112,122) adapted to connect to a source of electrosurgical energy such that the electrically conductive tissue contacting surfaces are capable of conducting electrosurgical energy through tissue held therebetween; a drive rod extending at least partially through the elongated shaft, the drive rod operatively coupled to at least one of the first and second jaw members such that reciprocation of the drive rod in an axial direction with respect to the axis A-A induces the first and second jaw members to move between a first position in spaced relation to one another and a second position closer to one another for engaging tissue; a drive assembly disposed in the housing and operatively mounted to a handle operatively coupled to the drive rod to induce reciprocation of the drive rod in the axial direction such that said handle is operable to move the first and second jaw members between the first and second positions; and characterised by the drive rod being flexible; and a fine adjustment assembly coupled to the drive rod to finely adjust the opening of the jaw members relative to one another prior to final assembly, the fine adjustment assembly comprising an adjustment knob disposed about the axis A-A and an adapter connected to the drive rod, the adapter being threaded at a distal end thereof to threadably engage the adjustment knob such that rotational motion imparted to the adjustment knob adjusts the length of the drive rod relative to the drive assembly thereby allowing the separation distance of the jaw members to be accurately and finely controlled.