Aluminum spinner includes two and three slots and can be used for engines of various brands with different specifications. The Cone cover is made of casting aluminum, Base plate is made of aluminum. Each set of spinner includes five parts: Cone cover, Base plate, Brass bushing, Brass adapter nut and Hex screw. Brass nut is made of H59-1 Brass-stick by CNC machine tools and plated with Nickel, having high precision and excellent concentricity. Various nuts match the axis of different engines. Brass bushing is made of H59-1 Brass-stick by CNC machine tools.