Fractures of the humeral shaft are commonly encountered by orthopaedic surgeons, mainly in the age group ranging between adolescence and adult, in which treatment can be mananged operatively using plate and screws, intramedullary nail or external fixator. In this case, a patient had an operation for humerus shaft fracture, an intramedullary nail was applied and bone union occured. When removing the metal, and because the proximal entry of the intramedullary nail could not be tightly interlocked with the metal removal set due to entry screw thread wear, it was necessary to devise a certain tool. A 6.5 mm diameter cannulated screw was used as a alternative device for removal of interlocking intramedullary nail.