Using these DeWalt reciprocating blades is easy. First, make sure your reciprocating saw is turned off. Insert the blade into the saw's blade clamp and tighten it securely. When you're ready to start cutting, hold the saw firmly and turn it on. Let the blade do the work; don't force it too hard. As for maintenance, after each use, wipe the blade clean with a dry cloth to remove any debris. If it gets dirty, you can use a mild solvent to clean it, but make sure to dry it thoroughly. Store the blades in a dry place, away from moisture to prevent rusting. Always wear safety goggles and gloves when using these blades to protect yourself from any flying debris.