A small extension that moves the camera 14mm or 19mm so that the camera lens is centered on the helmet. Includes screw and nut.
 
9mm for GoPro 11 Mini
14mm for GoPro 1-8
19mm for GoPro 9-11, Insta360 ONE RS
 
The angle version is recommended for the cameras that are used with a housing or frame. Of course, it can also be used for everyone else.