What is a back saw?

A back saw is a type of hand saw that has a stiffened spine on its back to reduce flexing during use. The blade of a back saw is typically narrow and rectangular with fine teeth designed for precision cuts. The saw’s stiffened back also gives better control when starting a cut. Back saws are commonly used in woodworking and carpentry for making accurate, straight cuts, such as in making joints or cutting small pieces of wood like molding or trim.