Using your DeWalt DWAR156CT-3 reciprocating saw blades is a breeze. First, make sure your saw is turned off and unplugged. Insert the blade securely into the saw's blade holder. When cutting, apply steady pressure but don't force it too much. These blades are great for cutting through wood with nails, thick metals, stainless steel, and cast iron. For tough demolition jobs, they'll hold up well thanks to their durability. As for maintenance, after each use, wipe the blades clean with a dry cloth to remove any debris. If the blades get dirty, you can use a mild solvent to clean them. Store the blades in a dry place to prevent rusting. Also, be careful when handling the blades as the carbide - tipped teeth are sharp. Always wear safety goggles and gloves when using these blades.