Abstract: A tool for pulling a lockwire, which extends around the intersection of mating cylindrical surfaces within a case and extends tangentially from between these surfaces through an opening in the case to a termination at the exterior of the case, has a body which mates at one side with conforming exterior elements of the case adjacent to the opening. The body extends tangentially of the surfaces from the one body side and the case opening. The tool has an extraction rod extended from the case opening through a square passage within the body. The lockwire is of rectangular cross section with opposite surfaces which are parallel to the axis of the mating case surfaces, and the lockwire termination has a hole extending between these surfaces. One rod end portion is of square cross section fitted to the passage and ends in jaws disposed to fit oppositely over these lockwire termination surfaces so that bores in the jaws are aligned with the lockwire hole.