The bending iron or privatization to steel in antiquity coming from bash such as sword bashing , knife, machetes, hoes, axes, spears, etc. then change are steel vise and bake. Nowadays change it is bending machine and machines press which made more convenient. However, the industrial factory found problem is bent steel. Render can not iron cutting or privatization to steel. Must curling steel as standard. And bending machine to steel of industrial factory too large