Using these HQ Ultralight Whoop Propellers is easy. First, make sure your device has a 1mm shaft to fit these props. Simply attach the propellers to the shaft, ensuring you put the CW (clock - wise) and CCW (counter - clockwise) props in the correct positions as required by your device. When flying, always keep an eye on the props. Avoid flying in areas with a lot of debris or obstacles, as this could damage the props. For maintenance, after each use, check the props for any signs of wear or damage, like cracks or chips. If you notice any issues, it's best to replace the prop. Keep the props clean by gently wiping them with a soft cloth. Store them in a safe place, away from sharp objects that could scratch or break them.