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