Reciprocating saws make quick aggressive cuts through wood, metal, and nail-embedded wood. They are used in demolition, construction, metalworking, and other applications where precision is unimportant. Interchangeable blades are used to cut specific workpiece materials, such as wood or metal. Cordless reciprocating saws are battery-operated so they're portable and can be used away from a wired power source. Corded reciprocating saws generally have more power than cordless tools and require access to a wired power source.