Hurst logo "Sidewinder" shifter knob: 2 1/8" ROUND BALL of thermoset resin Hurst logo (lapel pin) embedded within a clear layer of cast resin on top Plain sides, no logo Recessed brass mount w/ M16 x 1.50 thread Sale optionally includes ONE adapter to smaller thread size Refer to the thread guide for more info Jam nut of specified size included; knob will break if mounted w/o nut! Regardless of application, confirm thread size BEFORE purchase Integrated push button, normally open, momentary switch ~15" long 18ga wire pigtail 10A max rating, use relay for higher power levels Use for line loc, nitrous, transbrake - anything activated on demand