Anatomico. The MOMO Anatomico shift knob: ergonomic, stylish, adaptable. Anatomic shape for natural hand fit Premium top grain leather with stitching Machined black anodized collar Non-threaded universal shift knob with set screws Tall and short size options Distinct MOMO Arrow logo detail Disclaimer: This is a non-threaded shift knob. The inside diameter of the hole is 14mm and 50mm deep. The shift knob is secured by 3 set screws and rubber protection covers (included in package). Fits shift knobs with a shaft diameter between 12-14mm. *By request/order.