A medical instrument as a forcep is disclosed herein having pivotal handles carried on an instrument body from which an elongated tube projects enclosing a push-pull rod. The rod carries a pivotal jaw arrangement and outwardly projecting from the tube for grasping or gripping purposes. The other end of the rod is coupled to the handle for actuation of the jaw arrangement by either push rod or pull rod functioning. A spherical piston gear interconnects the rod end with the jaw arrangement and a rod travel limit stop is operably connected between the handle, rod and instrument body. An electrode is carried on the body in installed fashion for supplying energy to the rod and jaw arrangement for cauterizing purposes.