Push Button Lock-Out Black with Red Button Shift Knob 5/16-18 threads only - this one.
These knobs are a custom order knob for dragster cars, etc...
2 1/8" solid black with Red side-mount power button attached to wire
Features a heavy-duty quick release 12 volt, normally open switch. Ideal for use with roll control trans brake, nitrous, etc.
18 Gauge wire - 24" in length.