Purchased electric extension cords on a reel are often not expensive, but have a very flimsy design. It is a good idea to make a home-made reel extension cord using the remains of polypropylene pipes, a pair of pieces of plywood and wires of the desired length.
A stable framework is made of pipes, plywood becomes the round sides of the coil, the center of which is made of a piece of sewer pipe. The extension cord can be made of any size using high-quality wire designed for the load.
One of the main advantages of this design is that it is easy to use, the wires are not confused when unwinding and when you twist it back.