The propeller protector has been improved, the propeller will only seperate from the airplane when it impact something in the state of full throttle, and when you turn throttle into the middle position or not more than it(half-throttle), the propeller will only stop rotating if it impact something instead of seperating from the airplane, that reduces the probability of loss.
Original spare propellers, 100% new, good quality.
In the box:2 Propeller 3-Blade Full Sets(Prop Saver Shaft Upper Part + Propeller + Screw+spinner)and 2pcs Propeller Saver Shaft Adaptor.
They have been tested at the factory to ensure that you can install them in the correct type of airplane.