Scubapro Hydros Pro Mini D Ring Set The Hydros Pro Mini D-Ring Set allows you to attach Knives, Torches and Surface Marker Buoys. The Mini D-Ring plate is ideal for attaching marker buoys and dive lights to your Hydros Pro, plus it streamlines hose routing. 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. Watch this short video to find out more about the Hydros Pro Multi Mount Matrix System: