Aluminum is a very durable and commonly used material that can found in many construction projects as well as many products and tools. As touched on in this YouTube video, everything from aluminum framing systems to aluminum accessories and parts can be made with a process known as extrusion. Aluminum extrusion is a fairly simple process overall that can be used to make a wide range of metal devices.
In this process, aluminum alloy is forced through a die that has been designed with a specific shape and design. A powerful ram forces the softened material through the die, and it emerges on the end at the exit point of the die-cast. When it exits, the aluminum is now in the same shape as the die. In this way, it is much like squeezing toothpaste out of the tube.
Aluminum materials made in the fashion can be in any shape, size, and length needed. This makes aluminum framing systems and other in-demand components easier to mass-produce. They are all the same size, shape, weight, and much for symmetrical than trying to fashion items by hand.