Hand hacksaws are made in two types namely a fixed frame and adjustable frame oriented as shown in Fig. and Fig. The former possesses solid frame in which the length cannot be changed and where as the latter comprises the adjustable frame which has a back that can be lengthened or shortened to hold blades of different sizes. The hand hacksaws are commonly used for sawing all soft metal. They consist of a frame, handle, prongs, tightening screw and nut, and blade as shown in figure. Its frame is made to hold the blade tightly. However a power operated hacksaw can also be used for cutting raw materials in sizes in case of continuous cutting generally occurring frequently in fitting or in machine shops. Source A Textbook of Basic Manufacturing Processes and Workshop Technology by Rajender Singh.