[Durable Structure] They are made of high-quality plastic and metal, and the combination of metal bearings and non-slip matte contact surface is durable and can be used for a long time without failure. [Excellent Performance] It can reduce the turning radius when in use, help beginners and unskilled drivers to pass the turning process safely, and facilitate safe driving. [Easy to Install] No need too many installation tools, just find a suitable position to place the wheel knob, install the outer layer, insert the inner pad, and then fix the screws. [Slip Surface] The surface of the spherical design of the square disc fine-tuning knob is non-slip and comfortable to grip. Yes, the exterior design can make your car more stylish. [General] This steering wheel fine-tuning knob is compatible with all types of cars and vehicles, and can be used on cars, four-door cars, trucks, SUVs, and so on.