This is a mounting platform for a standard camera with a standard 1/4" screw attachment. I made the hole for the 1/4" screw so that you had the choice of tapping it for a 1/4-20 thread, or using a camera screw with a non-threaded through shaft with threaded end, or you can drill it out for a 1/4" bolt to pass through, your choice.

I had noticed that there were so many mounting choices and adapters for a GoPro but I couldn't use them for mounting one of my small video cameras that had a standard 1/4-20 mounting screw. So, now there is one.