Southwire™ 2/3 STW, 9-inches Twist To Lock Generator Power Cord Adaptor safely converts a 20-amp receptacle to a standard 15-amp grounded receptacle with one quick twist. The highly visible yellow jacket and molded connector is built to withstand the rugged outdoors and increases visibility to minimize tripping incidents. This generator extension cord adapter is great for heavy-duty industrial applications such as operating circular saw, heater and table saw. Simply twist the 20a receptacle to lock into the 15a receptacle to convert the plug effortlessly.