Using these HQProp Ultralight Whoop Propellers is easy. Just attach them to your device with the 1mm shaft. When using, make sure the CW and CCW props are installed correctly. As for maintenance, keep them clean. Wipe them gently with a soft cloth after use. Store them in a dry place to prevent damage. Avoid dropping or hitting them hard as they are lightweight. If you notice any signs of wear or damage, it's time to replace them.