1. It can be installed easily. 2. It is pretty lighter than existing aluminum spinner. 3. Condition of propeller bolt can be checked frequently. 4. Throttling response would be improved. 5. It can be used for propeller drilling jig and semi-permanently. 6. It looks nice because of beautiful colored annodized surface. 7. Spinner machined by precision CNC will provide accurate balancing and reduce vibration of engine.