Using this Hypertherm 65A SYNC Hand Cutting Consumable Kit is easy. First, pick the right cartridge for your project - the Drag Cutting Cartridge for general use, the FlushCut Cartridge for flush cuts, and the FineCutting Cartridge for more precise work. Just install the chosen cartridge into your plasma cutter as per the machine's instructions. When using, make sure to keep a steady hand for a smooth cut. As for maintenance, after each use, clean the cartridges gently with a soft cloth to remove any debris. Store the kit in a dry and cool place to keep the cartridges in good condition. Avoid dropping or rough handling of the cartridges to prevent damage. If you notice any signs of wear or malfunction, replace the cartridge right away.