This is a carry handle for your Phantom 3 so you can use the quadcopter as a gimbal to steady your hand held shots.
Use without propellers, of course and at your own risk. I would suggest using a rubber band to make the handle clamp the drone stronger.
Made from three parts. Some fitting will be required.
Youtube video demo: https://youtu.be/Ory49N_0Ulw
If you want to sell my design on eBay or anywhere else you must ask my permission first.