CUSTOM THREADED ADAPTER We customize metal threaded adapters for you to choose from Thread size of gear shift knobs includes M8x1.25, M10x1.25, M10x1.5, M12x1.25. DURABLE MATERIAL Each shifter knob is made with a Grade A3K Twill Carbon Fiber Grip Black Aluminum Alloy TopBottom. Measuring 8.5cm H x 3.5cm Top x 2.5cm Base, weighted 5 Oz. Our weighted shifter knobs will leave you impressed TRANSMISSION Our stick shift knob is specifically designed for vehicles with a stick manual speed or buttonless automatic transmission shifters. Make shifting your automotive gear stick faster easier CUSTOM DESIGN You care about your ride, and we do too. This is why we take the time to custom make our interior weighted shift knob. With a variety of colors to choose from, you are sure to find the right cool look and fit for your vehicle EASY INSTALL No mods or tool needed. Simply remove the original car shift knob, select the correct stainless steel threaded adapters screw your new shifter cover onto the knob rod. Great for any sports car, pickup truck or SUV