Using these HQ Ultralight Whoop Propellers is easy. Just attach them to your device with the 1mm shaft. Make sure to install the CW and CCW props correctly according to your device's requirements. When using, avoid hitting hard objects as the polycarbonate material, though durable, can break on a strong impact. For maintenance, gently clean the propellers with a soft cloth after each use to keep them in top - shape. Store them in a safe place away from sharp objects to prevent scratches or damage.