OER reproduction of the original clock/tripmeter reset knob designed for use with various 1963-90 General Motors models. This knob set includes 2 knobs and 2 retaining nuts. Measures 1/2" long. Replaces GM part number 3794017, smooth knob, most 1963-77 models and GM# 3973601 knurled knob, most 70-90 models. This replacement knob set may differ slightly from the original cosmetically. A metric and a standard nut have been included for installation. Carefully check and use the installation nut that correctly fits the clock stem on your vehicle.