A Pair of GoPro thumbscrew spanners. Almost indestructable by design. You are purchasing two. One Red ( cant lose these in the long grass at bike meets ) and the other is black.
I spent a longtime perfecting this design. Their easily used without the need to remove your glove. Their shape makes them easy to find in your pocket, and a lot safer than many tools I have seen in peoples pockets !
Using this simple but well designed spanner will help ensure your gopro / sports camera will not move, or come off whilst riding.