(STREAMLINE DESIGN) : Steering wheel spinner is made of premium quality and silicone, anti-skid and sturdy after installed, and won’t scratch the steering wheel. Our power handle ball can rotate 360 degrees,Easy to Operate. (MORE SAFETY) : Steering knob has premium quality and built-in bearings structure. With the silicone knob cover and streamlined design, our steering knob can provide the much-needed support for controlling steering wheels safely, conveniently and effectively. Durable construction fits for prolonged use. (BEST DRIVING ASSISTANT) : Makes driving more flexible and comfortable by lessening the turning radius.The bearing-mounted power handle enables drivers to steer softly when driving on a curve or parking cars. Especially for beginners or people struggling with arthritis, muscle problems, carpel tunnel syndrome, low muscle tone and the likes. (EASY TO USE & QUICK INSTALLATION) : Just find the right area to place the wheel knob, attach the outer layer, embed the inner cushion(if needed),then fix the screws. Pls attention:OTAN power Handle spinner just fits the standard wheels — diameter: 26-36 mm or 1.1-1.4 inch. (BALL SHAPED Design : Anti-slip surface is comfortable to grip. Elegant appearance design make your car more fashion.