Using this DC Sports shift knob is a breeze. First, select the appropriate metric adapter that fits your car's shifter. Then, screw the shift knob onto the shifter until it's firmly attached. When using it, you'll notice a more stable and smooth gear - changing process. As for maintenance, keep it clean by wiping it with a soft cloth regularly. Avoid using harsh chemicals that could damage the finish. Also, check the tightness of the shift knob occasionally to make sure it doesn't loosen up during driving.