The extension cords are used to extend the socket to increase the length of power cords, so that they can save space and avoid using the bulky plugs. The extension cords are so durable and elastic that can be used for long time. The extension cord has the features of abrasion resistance and waterproof so that it can be used safely in a humid environment. In addition, the cable can bear the damage of long exposure to sunlight. SUPER MACHINERY can provide you with wire stranders for producing the extension cords, and even customize the wire stranders based on your requirements.