The Thread On Daytona Style Spike Gearshift Knob with 13/15/18 Speed Adapter is a practical and versatile product that enhances your driving experience. This black Daytona style spike gearshift knob features a CNC machined grip for optimal control and comfort. The mounting adapter can be purchased separately, allowing for easy installation on most 13/15/18 speed shifters. With its durable construction and sleek design, this gearshift knob is a must-have for any car enthusiast. Improve your shifting precision and enjoy a more comfortable grip with this high-quality gearshift knob.