Southwire™’s twist-to-lock extension cords keep tools locked into power, eliminating the frustration and hassle of tools coming unplugged. When you connect a tool or other electrical device, these cords provide a lock that can only be disengaged by choice. The 12/3 vinyl jacket is designed to resist moisture, abrasion and prolonged exposure to sunlight for durability which makes this an all-purpose cord perfect for indoor or outdoor use.