Using these DeWalt reciprocating saw blades is easy. Just insert the blade into your reciprocating saw according to the saw's instructions. When using, make sure to hold the saw firmly to ensure straight cuts. These blades are designed for metal cutting, so avoid using them on other materials like wood. For maintenance, after each use, wipe the blades clean to remove any metal shavings. Store them in a dry place to prevent rusting. If you notice the blade getting dull or damaged, replace it with a new one to maintain good cutting performance.