(Allied Precision) The revolutionary Lockndry outdoor/indoor detachable power supply cord provides a water-resistant seal while keeping the connection firmly secured. The specially designed plug on the Lockndry cord fits any standard outlet, but when mated with a Lockndry compatible power cord, the large black nut pulls the plug tight against the gasket to form a water-resistant seal. The red nut then locks everything in place and prevents cord separation. Great as an all-purpose extension cord too! 16 gauge, 13 amp rating.