Iron wire coil, 40 mt each
The skeins of iron wire are used to reinforce large frames by joining the top and bottom sides of the frame.
Wire thickness 0.4 mm.
To fix the wire to the frame you need to:
1) Insert a nail in the center of the upper side and another in the center of the lower side of the frame (preferably a large headed nail).
2) Twist the wire around one of the two nails.
3) Stretch the wire so as to join the two nails.
4) Twist the wire around the second nail making sure that the wire remains taut.