Product details:

Lokar SK-68MCB: Auto Transmission Shifter Knob Adapter; GM Muscle Car style with Black Knob - These Lokar shifter knob adapters are designed to adapt to most aftermarket shifter knobs for use with any Lokar shifters. They feature common 3/8-16 in. or 3/8-24 in. female threads and hidden jam nuts for a flush mount against the shifter knob. Choose between classic chrome and black, whichever finish suits your vehicle the best.