Forgive me if I sound a bit dim but how do you fit this thing?

It only has a picture on the back which suggests that the bolt/clip connection goes up the bottom of the steerer tube. How does it connect and hold in place securely though?

There is an allen key bolt thing which seems to expand a bit when you turn it but doesn't look like it would be enough.

Didn't have much time to play with it in the rain, as I thought it would be quite quick to fit.

Shove it up the tube and tighten up.

Be warned though - they can come of as mine did which aint to smart if you're speeding along.

If your fork crown is larger than 45mm it won't fit.