Turning Point Hub Kit: 507FeaturesLifetime WarrantyNever buy another hub kit system againInner splines adapt to the engineOuter hub compatible with different propsReduce gear shock & engine/drive damageSave up to 30% when purchasing a replacement propEliminate propeller vibration & chatterEliminate hub cracking & failureCorrosion resistant materials - brass splinesReduce gear shock & engine/drive damageCompatible with Michigan Wheel; XHS; and Mercury; Flo Torq; hub kits, but greatly increases ease of installation, durability, and shock absorption value.Also adapts to all Michigan Wheel; and Mercury; interchangeable propellers