This is the Scubapro Hydros Mini D-Ring Plate Set Features: Attaches to the multi-mount matrix points on the BCD. Includes the mounting plate, mini D-rings and two stainless steel screws. Best used with bungee cord sets, carabiners and magnetic quick clips. This innovative Mini D-Ring Plate is ideal for attaching marker buoys and dive lights to your HYDROS PRO, plus it streamlines hose routing.