dolphin Steering Wheel Spinner Power Handle Car Steering Wheel Suicide Spinner Accessory Knob for Car Vehicle Material: ABS+ Stainless Steel Ball size: Approx. 5.8*3.8cm(D*H) When turning car, it lessens the turning radius thus helps beginners and lady drivers to drive safely and conveniently The bearing-mounted power handle enables drivers to steer softly when driving slowly and parking cars With a rubber ring, it won't abrade the steering wheel