Specification: Item Type: Shift Knob Material: ABS Fitment: Replacement for GM 2009-2013 Replacement for Vauxhall 2009-2013 Replacement for Buick Regal 2009-2013 Replacement for Opel Insignia 2009-2013 Package List: 1 x Shift Knob Installation steps: 1. Remove the original manual car lever knob and take off the cover at the bottom of the shift head. 2. Install the rubber adapter on the gear stick. 3. Insert the bottom cover of the new gear knob onto the shift stick rod. 4. Place the aluminum alloy cover on the rod, then attach the shifter handle knob. 5. Tighten the small screws and secure the cover. Attention: 1. If your original manual gear knob cannot be removed, this product is not compatible. 2. Before purchasing, verify that the adapter size matches your cars gear stick size.