Sign fence clamp. Comes with galvanised bolt, nut and washer. Goes around the wire on fence and bolts to the back of the sign. 4 recommended for most small signs up to 450mm wide and an extra one at the top for 600mm wide. Please use 6 clamps for 900mm wide signs (3 top and bottom) for steel signs, otherwise they will 'droop' in the middle.
If in doubt about the wind rating on the fence with the signs attached, consult the fence installer.