I bet some elderly gentlemen remember this vividly. It had two names, if I'm not mistaken.: suicide knob or Neckers knob. It was a knob that attached to the steering wheel of an automobile or other vehicle or equipment with a steering wheel. Other names for this knob include: suicide, necker, granny, knuckle buster, and wheel spinner. It was intended to help make steering with one hand less difficult or faster. I think there were some states that banned this. I think some disabled people found it very useful as well. So do you remember this? SHARE if you do.....