Drive in post spikes are a quick and easy way to erect fencing and garden posts as they require no digging or concreting into place, saving time and money. The bolt secure version features 2x 8mm carriage bolts that tighten and clamp the post firmly into the post holder section to prevent any post movement, as well as allowing for over / under sized post tolerance. Designed to allow for removal of the post at a later stage if required. Prevents against post rot and decay as it will hold the base of the post above ground level. 600mm spike. Suitable for wooden posts only.