【Product Description】 Shift Knob Conversion Adapter - Extension. This adapter allows you to install an M12x1.25 shift knob on a vehicle with an M8x1.25 thread pitch. Converts the thread diameter of the shift knob and shift lever. Converts from shift knob side M12x1.25 to shift lever side M8x1.25. 【Product Specifications】 Material: Aluminum Size: M8x1.25 (compatible with M12x1.25 on the shift knob side) Quantity: 1 piece 【Compatible Vehicles】 Universal Can be used when replacing with an aftermarket M12x1.25 shift knob. The material is aluminum and is soft, so be careful not to overtighten during installation.