Manual owner, turn around to change in a hurry.Back on the spot and get stuck.You need one of these boosters to make your driving experience more comfortable.360 degree smooth , refuse to .Anti - slip silicone shell, sweat no slip, no odor exposureSpecial note: this product can only be used under 20km/h as an auxiliary ball.Make the boosters are fixed before driving and 't rely on too much.Everything is for your safety.:1. Select the appropriate installation position on the steering (generally, it is recommended to install it in the upper corner, of course, depending on personal habits).2. First, separate the boosters' buckles and install in the installation position, then buckle the bottom parts of the boosters3. Tighten the two screws with an inner wrench.4. Confirm the fixation.Test stability at a stop5. If the steering cover is installed on the steering , please remove the u-shaped rubber pad before installing itAuto Spinner Knob BallApplicable : modelsColour:BlackMaterial:metalSize:: 63 mm x 22 mm x 50 mmPackage Contents:1x steering booster ballOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.