Kaidan KiWi Digital Camera Tripod - Manual (Page 6)

Adjusting the Detent Force
If adjusting the Friction Cap does not provide enough tension, there
is a spring plunger in the indexing hub that can also be adjusted to
vary the force. Use a flat blade screw driver to move the plunger in
and out as desired. A convenient way to adjust the plunger is to screw
the plunger all the way in until it gently bottoms out. Then unscrew
the plunger about one complete turn.