INSTALLATION STEPS:  1. Unscrew the original gear shifter knob to get it off from your gear stick. 2. Wrap a few turns with electric tape on your gear stick thread to keep tight if necessary. 3. Install the matching threaded adapter on the shifting stick. 4. Screw the stick shift handle on the shifting rod with small screws by the Allen key and tighten all up.  TIPS:  * Make sure your original stick shifter removable. * Not suitable for the original car shifter with its own irremovable lock/function button. * For manual transmissions: Not suitable for the reverse gear of original car shifter needed to lift up. * For automatic transmissions: Cannot be installed for those cars with the reverse gear next to the 1st gear. * Wrap a few turns with electric tape on your gear stick thread to keep tight if necessary  SPECIFICATION:  ▶Color: Red ▶Material: Resin & aluminum alloy ▶Item Dimension: 2"Wx3"H ▶Threaded adapters inner diameter: 0.315", 0.394", 0.472" (caliber M8, M10, M12) Shift knob net weight:190g Package includes: 1 x Skull Red Devil Design Shift Knob 1 x Hex Key 3 x Plastic Adaptors(8mm,10mm,12mm) Set of Screws Fit for many cars such as Audi, Subaru, Lexus, Porsche, BMW, Mazda, Buick, Toyota, KIA, Honda, Hyundai, Volvo, Mini, Mercedes Benz, Volkswagen, Ford, Lincoln, Scion, Eulogize, Chevrolet, Nissan, Infiniti, GMC, Cadillac, Dodge, Chrysler, Land Rover, Mitsubishi, Jeep, FIAT. Fit For: Automatic Transmission which is without button.Manual Transmission no need to lift up the shift while backing out Features: 1.Coated with high quality material for enhancing strength and durability 2.A shift knob with threading adapters and fits most threads 3.Perfect for most any manual or automatic 4 5 6-Speed 4.Easy DIY installation,conveniently replace existing gear shift knob 5.Cool design and look for the interior of your vehicle Note: Make sure the original shift knob can be put away. Please read all description & size before ordering the product. Many Other Types Of Shift Knobs Are Available In Our Store, Welcome for Your Purchase! *No installation Tool & No instruction is Included, Professional Installation is Recommended*