Goal post arrowhead net fixings Arrowhead Net Fixings are inserted into 8.6mm diameter holes in the rear of the goal posts uprights and crossbar. When the central rod is inserted into the fixing they expand (like a wall plug) to give a secure fixing into any goalpost. Goal nets can be attached and removed from the posts in minutes.One pack contains fifty fixings. A full size/regulation goal (24 'x 8') would normally require about forty Net Fixings. The recommended distance between hooks is 300 mm.