Using these HQProp Juicy Prop J33 propellers is easy. Just attach them to your device according to the right CW and CCW directions. When using, make sure your device is in good condition. Don't use them in extremely harsh environments. For maintenance, keep them clean. You can use a soft cloth to wipe off any dirt. Store them in a dry and cool place when not in use. Check for any signs of damage regularly, and if you find any, replace them promptly.