The truth is that all the intermediates between humans and their ancestors (which diverged from the common ancestor of humans and chimpanzees) are now extinct (and there was likely no fundamental distinction between humans and their ancestors).
Rim brakes. Rim brakes are so called because braking force is applied by friction pads to the rim of the rotating wheel, thus slowing it and the bicycle. Brake pads can be made of leather, rubber or cork and are often mounted in metal shoes. Rim brakes are typically actuated by a lever mounted on the handlebar.
Any metal to be punched or bent can be formed on a press brake. The materials generally used on a press brake are low carbon steel, alloy steel, stainless steel, aluminum alloys, and copper alloys. Press brakes has two types: mechanical drive systems and hydraulic drive systems.