How to Install? Firstly, you need to anticlockwise unscrew the top cover part on the 5.5mm camera tip. Then you'll see the screw thread, clockwise rotation to screw the hook/magnet/mirror to the camera tip. Then you're ready to use the hook/magnet/mirror. Important Notes: 1. These accessories are included in the original product package. If you've already ordered our original AW655 5.5mm endoscope, there's no need to order again. These parts are only intended for replacing the original damaged kits. 2. This set can only fit for original NIDAGE AW655 and WH9 wireless endoscope camera, other models endoscope are incompatible. Pls make sure the model of your endoscope before purchasing. Package: 1 Hook 1 Magnet 1 Mirror.