This 8-ball designed steering wheel spinner knob has an adjustable clamp with rubber padding and is easy to install. This can be installed on a semi truck steering wheel to ease wheel control (especially when reversing) or on a lawn mower and on a passenger vehicle. The ergonomic ball design fits nicely on the palm of your hand for easy maneuvering. This is a Brodie knob that rotates independently of the steering wheel. This knob can make it easier to operate a vehicle or piece of machinery while one hand is occupied. The iconic 8 ball is a popular design symbolizing perseverance and the last man standing. It can also mean being stuck behind the eight ball or having to overcome a difficult situation. You decide what it means for you. It could just mean that it looks cool on your rig.