1. Function: fix the blades and motor of the drone to prevent tampering in the bag. 2. It is made of 3D printing technology and is made of plastic. Soft sponge is attached to the part in contact with the fuselage to prevent the fuselage from being scratched. 3. Net weight 7g 4. Product size 6 x 8 x 1cm 5. Note: only 2 propeller holders are included, no other
