There are a number of different sized metal post support spikes available on the market for different fence heights.  Using a metal spike means that you can avoid digging a big deep hole within which to place your fence post.  Keeping a timber fence post out of the soil (above ground level) also helps to reduce the likelihood of the post rotting.

The most common sizes of metal spike include:

A 600mm (24 inch) spike – this will support fences up to 1.2m (4 feet) high.
A 750mm (30 inch) spike – this will support a fence which is 1.8m (6 feet) high.

In order to drive the spike into position you will need to use a sledgehammer and/or driving tool. Remember to check the ground for underground services before starting.  To protect the socket end of the fence support when hammering the spike into the ground, it is a good i

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