What is this and how does it work? Is this needed? Anyone know http://store.dji.com/product/mat ... astener#/?_k=aukqmn

I would like to know that to

It goes on the inside of each arm near the body of the aircraft, it is what the 4 screws on the arm tighten into, inside the tube. We had one strip out because DJI over tightened with too much loktite, had to pull it out and repair ourselves since DJI didn't sell at the time.
So, not needed on a M600 unless yours breaks, or you start to make your own arms.

shawn_ Posted at 2017-1-10 07:18
It goes on the inside of each arm near the body of the aircraft, it is what the 4 screws on the arm tighten into, inside the tube. We had one strip out because DJI over tightened with too much loktite, had to pull it out and repair ourselves since DJI didn't sell at the time.
So, not needed on a M600 unless yours breaks, or you start to make your own arms.

Thanks Shawn ! A better description of the product would be nice. appreciate the response.