Product Features: > This MUGEN Gear Knob ONLY Fits Automatic Transmission WITH Side Release Button > It is a great automobile accessory, which is made of high quality PU Leather with light weight carbon steel > Its unique Design Provides an Elegant and Fashionable Driving Environment > This gear knob can recover the performing as well as you used to and better for racing > Easy to install and disassemble. If you can't install, please find a professional installation > Package with adapters with 4 different sizes ( 0.8 /1.0/ 1.2 /1.4 cm) Red Stitching Around the Shift Knob Installation Instructions: > Remove existing shift knob > Select correct adapter and install over shifter > Side shift knob on to shaft , make sure release button works > Tighten down with 3 set screws Package include: > x3 adapters (Length: 3.8 cm ; Inside Diameter: 0.8 /1.0/ 1.2 /1.4 cm ; Outside Diameter: 1.5 cm) > x3 silver screws (Size: 0.5 cm ; diameter: 0.4 cm) > x1 wrench (Size: 5.1*1.7 cm; Opposite Sides: 2 mm)