Surgical screwdriver

A surgical screwdriver comprising:

• a first rotating shaft configured to be rotated about a respective longitudinal axis;
• a second rotating shaft extending along a respective development axis and having a shaped end tip which can be inserted into the head of a screw;
• and
• a transmission member interposed between respective first ends of the rotating shafts,
• wherein said transmission member comprises a pair of first and second hemispherical elements hinged together about a junction axis which is perpendicular to the longitudinal axis of the first rotating shaft, wherein the first and second hemispherical elements are hinged together so as to transfer rotation from the first rotating shaft to the second rotating shaft, and
• wherein the first hemispherical element is hinged to the first end of the first rotating shaft and the second hemispherical element is hinged to the first end of the second rotating shaft so as to define a three-axis joint about which the first and second rotating shafts pivot relative to each other.