This is a shift knob extension adapter. It extends approximately 30mm. M6 x 1.0 Stainless steel, unlike iron, is a hard material, making it difficult to machine. However, it is resistant to scratches, durable, and rust-proof. *Installation is at your own risk. Shipping is anonymous, so you can rest assured. Other sizes are also available. If you need a specific adapter, I can create it. Please comment. Made using a general-purpose lathe, please refrain from purchasing if you are overly concerned with perfection. #car #bike #adapter #extension #ordermade #caliberconversion #caliberchange #oneoff #generalpurposelathe #truck #shiftknob #isuzu #fuso #underwaterflower #dekotora (decorated truck) #dressup #jimny #prius #hino #extension