A Post Support Spike is designed to enable quick and easy installation of timber fence posts, and are used best in normal soil conditions. Ideal for use with 70 x 70mm up to 80 x 80mm posts. The 750mm spike is for use with panels above 1.2m in height. This product can simply be driven into the ground using a driving tool (sold seperately) and a sledge hammer. The twin bolt mechanism provides a secure fit around the wood and clamps in place which also allows for easy removal of damaged posts. We recommend checking the ground on which you intend to place the spikes for underground services before use. This product is manufactured from mild steel and coated in hammerite to protect against surface rust. This product enables you to fix your fence posts securely into normal soil conditions with ease. An adjustable box secures posts ranging from 65 - 80mm (nominal 3'). Manufactured from mild steel coated in hammerite to protect against surface rust.