Material: Our steering wheel knob is made of plastic and silicon, it is comfortable and ide-proof for driving, also will not scratch the steering wheel, ideal for prolonged use. 360 Degree Steering Control: This steering wheel knob built-in metal bearing, rotate 360 degrees smoothly,refuse to stuck, it can improve maneuverability. Gives you ability to pull of some really tight car moves to make the turning maneuvers much easier with much less effort. Easy to Installation: It's easy to install. Clip the ring on the steering wheel at a proper position, fast installation in 30 seconds. If you have installation problem or other problem, do not hesitate to contact us. Effort-saving Design: Due to the metal-ball bearing inside the spinner knob, driver can spin the steering wheel easily, making driving more flexible on continuous curves, U-turn road or when parking. Fit Most Steering Wheel: Steering wheel ball knob is suitable for many kinds of steering wheels including sedans, semi trucks, SUV, mini vans and lawn mover wheel and so on. Steering Wheel Spinner, Silic Power Handle Knob Booster, Steering Wheel Attachment for Cars, Tractor, Trucks, Lawn Mover Product Description Product name: Steering wheel spinner Material: Plastic and silicon Size: About 85cm/3.22inch Color: Black Package: 1pcs*Steering Wheel Knob Steering wheel spinner installation steps: 1. Choose a suitable installation location on the steering wheel; 2. Clamp the seat cushion on the steering wheel; 3. Install the outer layer on the mat; Fix the removable steering wheel spinner knob on the outer layer to complete the installation Noteplease don't forget to measure your steering wheel before buying Safe and Firm Soft Plastic Material Base + ABS Hard Plastic, firmly lock the steering wheel, double stable, without damage to the steering wheel. 360 Steering Control This steering wheel knob built-in metal bearing, rotate 360 degrees smoothly,refuse to stuck,it can improve maneuverability. Makes Driving Life So Much Easier Due to the metal-ball bearing inside the spinner knob, driver can spin the steering wheel easily, making driving more flexible on continuous curves, U-turn road or when parking. Steering wheel knobs for cars can help the drivers save effort, it can also reduce the driver's uncomfortable because of the long time driving.