I'm confused. How does the fastener head attach to the hatch cover?

> Dzus fasteners are used in aircraft and automotive applications where easy
> or fast removal of panels are required. Have you ever watched a Nascar
> race of drag race on TV and noticed the hundreds of little silver
> fasteners on the side panels or windows? Those are Dzus fasteners. They
> work by having a recepticle mounted on the frame or base material and
> another "anchor" mounted to the panel. They only take 1/4 turn
> to open/close. I have used them for the flush hatches on my yare. The many
> different types available can be a little confusing so here is a link to
> the manufacturer. If it works right it will take you to the model that i
> used on the yare. They have many uses in kayak construction. I've even
> used them for removeable tie down locations. I'm sure everyone has ideas
> of their own. Go check em out!