Item Type: Steering Wheel Power Ball Material: Resin + Metal + Rubber Fixing Ring Diameter: Approx. 3cm/1.3in Application: Fit for most car steering wheels, such as cars trucks tractors boats Package List 1 x Steering Wheel Power Ball 1Exquisite Design: The steering wheel spinner is designed with ball shape with thunder pattern, looks cool and pretty, feels smooth, adding a stylish sense to your vehicle interior. 2Reliable Materials: The steering wheel knob is made of resin and metal ring. There is a transparent rubber sleeve which can effectively protect your steering wheel from being worn and scratched. 3Convenient to Drive: The steering wheel knob is flexible and effortless to operate, helps to control and turn your steering wheel easily and effectively, bringing a relaxing and enjoyable driving experience. 4Easy to Install The knob comes with an about 3cm/1.3in diameter fixing ring, compatible with most types of cars and vehicles. All you have to do is just install the knob in the right position and tighten the bolts. 5Simple to Operate: The steering wheel suicide knob can effectively reduce the turning radius and steering resistance, you can turn faster and more smoothly even with one hand.