Which saw would you use to cut curved or irregular lines?

The keyhole saw is specifically designed for cutting curves and irregular lines, making it the most suitable choice for this purpose. Its thin, narrow blade allows for intricate cuts, and the pointed tip is ideal for starting cuts in the middle of a panel or piece of material. This flexibility is essential for creating detailed shapes and curves that other saw types, such as the crosscut saw or the back saw, which are designed for more straight-line cuts and specific angles, are unable to accomplish effectively. The hack saw primarily handles metal materials and is not suited for broader curved cuts, while a back saw's more rigid structure is tailored for precision cuts in woodworking, but still remains limited to straight lines or predefined angles. Thus, the keyhole saw stands out as the best tool for achieving precise and smooth curves and irregular patterns in various materials.