The flat shape of this unique extension cord allows it to lie flush with the ground. It can run under closed doors, and let dollies and other wheeled objects roll over it. FlatLine can be taped to floors or walls so it is completely out of the way and can also be sold as a specialty product with adhesive already applied to one side. The flat outer surface allows for unique designs, for example a measuring tape print or a brand name.

FlatLine combined with its cord-holder is a superior consumer extension-cord product with a unique, modern look. It has substantial benefits compared to current products because of its easy, coiling system. The holder keeps extra cord coiled up and stores it all in a compact package when not in use. The coil is spring loaded so it pulls the cord in with no effort from the user. It also locks into place when the desired length of cord has been unrolled.