LED Steaming Navigation Light with wraparound mast mount bracket. Rugged waterproof LED 225-degree viewable. 3nm visibility for power and sailboats up to 20 meters (65ft). Bracket wraps around any mast position fixture to mast drill & tap two holes for machine screws or drill for pop rivets. Easy installation for Signal Mate Steaming (masthead) navigation light. Construction: ASA Black plastic with UV inhibitors.