1. ✔Effortless: It makes driving nearly effortless. Steering Wheel Ball makes it SO much easier for you to steer your car! For drivers with shoulder or arm disease it can relax you. For long-distance drivers it can relieve your fatigue. 2. ✔Large Knob: Hypersonic Large knobs compatible with All Steering Wheels. Large Steering Wheel Knob With Bigger Size Base than other Spinners it fits most Cars Trucks Tractors Mowers Forklifts and Boat. 3. ✔Must-Have: Steering wheel ball knob is the best car accessories for elder people easy turning also it is fine if the two parts of base don t touch each other. What s important is that the Steering Wheel Spinners don t move on the steering wheel and installed correctly. 4. ✔Easy Installation: The installation can be completed in 1 minute - easy to install. Wheel knob spinner fits steering wheel wide 1.2 - 1.6 (if less 1.2 Please use the attached pads effectively to adjust the size). 5. ✔Rubber Pads: The rubber pad with good quality both to increase friction (on smoother steering wheels) and to protect the steering wheel from marring (all wheels).