The 1345S Propeller Installation Kit is required by the 1345s Quick-Release Props. The adapters screw onto the
motor, where they permanently reside. They allow the props to be
toollessly twisted on or off. The adapters work with the Inspire 1
motors as well as the motors for the E800 Tuned Propulsion System. A
pair is included, one for a clockwise (CW) and one for a
counterclockwise (CCW) motor.