Good quality but poorly copied.

In principle, the adapter is well finished and equipped with the described threaded insert. The housing can be plugged even with little effort. However, the adapter compared to the original is badly copied. The fastening screw has the thread end a hexagonal plate with teeth. This should be put into the recess of the outer adapter web and prevent the teeth against the teeth on the underwater housing unintentional fold down the camera. Unfortunately, this recess is missing in the bridge, so that the screw is too short. Unfortunately, no screw is possible. Either use another screw or drill hole to width across corners of the hexagon disk.