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 into place and prevents cord separation. The lockndry is great as an all purpose extension cord too. 25-foot