This is a new very correct (black) and very high quality screw on shift knob. This is correct for the Civilian and military FACTORY threaded gear shift lever. The factory threads were 5/16″. The M-series (50s + 60’s) Military shift levers were originally the push on style but I have found many that have been threaded after they made it into Civilian hands. If your threads are not 5/16″ this will not fit. This will fit the factory threaded levers on the MB, GPW, Cj2A, Cj3A, CJ3B, and early CJ5. NOTE: This large knob is not correct for the MB and GPW although it will fit.