Yosoo Propellers Prop Protector, Propellers Blade Rotor, Landing Skid Spare Parts Set for JXD 509G 509W RC Drone MAIN FUNCTION:These configurations are good replacement for the damaged or old propellers. GREAT QUALITY: These tools are made of high quality plastic which have good performance, being stable and durable, and have long service time. PROPELLER GUARDS: Greatly protect your propellers during flight, prevent your drone from crash during landing. PACKAGE INCLUDED: 4 x Protectors, 4 x Propellers, 2 x Landing Gear.