Because it's handmade, each shift knob has a unique character, including the wood grain and shape. It can be installed on both manual and automatic transmission vehicles! Note: It cannot be installed on shift knobs with a lock button, even on automatic transmission vehicles. To ensure it can be installed on any vehicle, we offer a free service to drill holes to match your bolt size. Please provide the bolt dimensions for accurate installation. Material: Gumi (Japanese Cherry) Length: 27.5cm, Diameter: 6.3cm Please comment before purchasing. Thank you.