The Zkulls GoPro Twin Plate is for attaching two GoPro to the front forehead of your headgear. You will need to have a heagear with a flat front in order to mount this to directly.
The Zkulls GoPro Twin Plate can also be used in conjunction with the No. L5824 Zkulls Hero Overkill PRO. Shipping Weight: 1 lb. (455g).