1. First, use a wrench that matches the screwdriver when installing.

2. Secondly, you must use circlip pliers to insert the pliers mouth into the pliers hole of the retaining ring and clamp the retaining ring.

3. Finally, install the hole on the fixture with a snap ring, then shrink the snap ring to a size smaller than the installation hole through a hole, and push the steel wire snap ring into the installation hole.