Upgrade your gearshift with the Thread-On Blue T-Shape Gearshift Knob. Made from durable die-cast aluminum with a chrome machined 1/2 inch 13 threads, this knob comes with a removable thread lock and fits most makes and models with 13/15/18 speed. The chrome 13/15/18 speed adapter adds a sleek touch to your vehicle's interior. Please note that this knob is not compatible with D-shaped shift knobs. Enhance your driving experience with this stylish and practical gearshift knob.