Bow makers first begin by choosing their wood. Then, they use tools to shape the bow in the way they want it - for example, the stick is thinner at the tip than it is at the frog and they have to decide the exact measurements and gradations that they want, and then execute them. The bow is planed and curved through a process of heating the wood and then shaping it. The frog is created and attached, and then the hair. This is a big simplification of a multi-step process that can take weeks to complete.