DJI Original Inspire 1 Quadcopter Lastest Upgraded 1345s Self-locking Reinforced Props Quick Release Propellers 2 Pcs (this version does not require DJI safety lock) Compatible with DJI Inspire 1 quadcopter (this version does not require DJI safety lock) Enhances reliability during flight. Features a new locking mechanism that prevents your propellers from becoming loose during flight Perfectly suited to the motor deceleration functions native to your Inspire 1 Note, it needs to be mounted on 22 quick release rotor adapter (please purchase the adapters if you do not have them) Package included: Propeller x 2; Free touch screen stylus pen is included (Random color shipped)