It's a wedge! The mounting bracket that comes with the RunCam HD holds that little camera very well, almost too well. I found the easiest way to get the camera out was to pry it out using a knife, but that will mark up the case so I designed this wedge to do the same thing and protect the plastic.

I'm sure you could use the wedge for other things... it's a wedge / spudger thing.

To use simply insert between the back of the camera and mount and press it in. Out pops the camera, no need to twist. See: http://gph.is/1YI0cQQ

Printing tip. Look at the picture of the example GCode. Do you see that bit of straight single band of plastic? You want that. It might be a quirk of my slicer but it's intended.