This mini pin is ideal for wood fixing it keeps the wire close to the building. Can also be used in masonry using red wall plugs.
For holding the wire close to the structure.
These need to be installed at least every metre (36") for pigeons or gulls, every 0.5 metre (18") for starlings and every 0.3 metres (12") for sparrows. There are many different types, for use on different building materials.