This is a custom built bracket to adapt the optional light to the standard SOS buoy. They are made of aluminum and have a cut out to allow access to the magnet hole under the light (used to disconnect battery to protect from excessive discharge for storage such as in winter and shipping). The holes allow for 1/4″x1″ Stainless Steel screws that secure the bracket to the topeye in the buoy (not supplied). Recommended getting the SS nuts tack welded to prevent tampering.Discount coupons not permitted for buoy items. Prices will be corrected on order submission as appropriate in relation to the price structure.