Features: Engineered with double ball bearing cushions technology, this universal steering wheel spinner knob enables effortlessly 360 degree control for drivers requiring single handed operation across cars, trucks, tractors, and marine vessels. The ergonomic silicone grip with hexagonal texture enhances tractions by 40% in wet conditions, while the corrosion resistant ABS+PC housing withstands impacts from 20°C to 80°C environments. Ideal for professional drivers, farmers, and boat owners needing reliable steering assistance during extended operation of semi trucks, forklifts, or agricultural machinery. Perfect for maneuvering heavy vehicles in tight spaces or navigating long distance routes where quick steering adjustments are critical for safety and efficiency. Easy installation with vibration dampening silicone pads eliminates rattling noises, ensuring secure attachment to steering wheels even when using wheel covers. Specifications: Material: ABS Type:Standard Version,Green,Red,Silver,Luminescent Package Includes: 1Piece Steering Wheel Spinner Knob note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.