The Barreled Door, the Greatest Security Technology of All Time

Before we can have locks and keys or even the barred door, we need doors themselves. The iron age advancement that allowed the same thing at a bar ed into bolt holes on the inside is still used to this day all over the world. This inanimate carbon rod pretty much tat's the same principle, a yesso. We'll get back to the bar an just a bit, cause the wooden bar is fabulous.