Universal steering wheel knob for cars and boats - Easy-grip ball with auxiliary control buttonFlexible and easy control: This steering wheel button can provide quick and easy 360 degree steering control for increased maneuverability. More leverage and faster turning response, solve the problem of heavy steering wheel. Smoother turns, especially hairpin turns, faster parking, safer merging of lanes.<br> Comfort and durability: High-quality double-layer structure and built-in bearings. Soft silicone button, non-slip No peculiar smell of sunshine, suitable for long journeys, relieve professional driver's neck and shoulder pain when turning the steering wheel. Give you a good driving experience.<br> Wide compatibility: The button can be compatible with the standard car steering wheel. The button is suitable for sedans, mini coopers, sedans, trucks, SUVs and minivans.<br> Easy to install: Assembly is easy. It is easy and convenient to install the steering wheel, you just need to fix the ring in the right position on the steering wheel, then tighten the screw to fix the ring securely.<br> Gift Perfect: The rotation assist ball adopts elegant design, the surface treatment is delicate and of high quality. which enhances the fashion of the car. This driving aid is a great help for beginners. This gift can increase driving safety.