When the central rod is pushed down into the fixing they expand (like a wall plug) to give a secure fixing into goal posts. Goal nets can be attached and removed from goal posts in minutes.
One pack contains 10 Arrow Head Net Fixings. A full size/regulation goal (24'x8') would normally require about 40 Arrow Head Net Fixings.
The Fixings can be applied to any goal post. Simply dill a hole and insert the Net fixing as shown on the video below.
No need to wrap the nets around posts with fast clips, so the net is neatly clipped on at the back of the uprights and crossbars.