Turning Point Hub Kit: 12Features. Lifetime Warranty. Never buy another hub kit system again. Inner splines adapt to the engine. Outer hub compatible with different props. Reduce gear shock & engine/drive damage. Save up to 30% when purchasing a replacement prop. Eliminate propeller vibration & chatter. Eliminate hub cracking & failure. Corrosion resistant materials - brass splines. Reduce gear shock & engine/drive damage