Below is a list of Extension Reels manufacturers from South San Francisco, California. Extension reels are a type of cylindrical device that mechanically or manually wind electrical cords to keep them organized, untangled and easy to use. Most of these reels automatically rewind and require a tug at the socket to unwind. Their prevention of loose electrical cord slack is helpful because slack gets in the way, takes up space, creates a tripping hazard, and is dangerous in environments with pets and small children. These reels keep the cord from catching on other objects or tangling, making the user’s task much easier.