Hurst 1631036 White Quarter Stick Replacement Shifter Knob Quarter stick replacement shifter knob is molded in metal thread insert Material of the knob is made of plastic with white high gloss finish Size of the thread on knob attachment style is 7/16-20 thread Features solid high gloss, high strength plastics with Hurst quarter stick logo Jam nut is included with this quarter stick replacement shifter knob