The 13/15/18 Speed Eagle Thread-On Gearshift Knob With Adaptor is a practical and versatile product designed for most makes and models. Made from quality die-cast metal with a chrome-plated finish, it offers durability and style. With three different styles available - plain, skull, and ace of spades eagle - it allows for personalization. The inside thread of 1/2 inch - 13 ensures compatibility. Please note that the mounting adapter and shift knob are sold separately. This product is a reliable choice for those seeking a functional and stylish gearshift knob.