2 3/4" ProSpin spinners are made from high quality barstock for strength. They won't crack like cheap cast aluminum spinners do. ProSpin spinners are also 30% lighter than cast aluminum. All spinners include a shaft bushing, prop nut, and bolt. All spinners are polished to a mirror shine finish as pictured above. Notes on Ordering: 1. Find out the size of the prop nut you need. The size of the included prop nut is listed below. 2. If you need a different prop nut, you need to order it separately. 3. Some engines, i.e. Saito engines, require a bushing that is larger than the nut. In such case, please let us know your special needs, in the notes of your online order, or when you call. We will try to match the correct bushing to fit your engine.