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, and up to 80 x 80mm posts. This 600mm spike is best used with 1.2m fence posts. We would recommend using a driving tool (sold seperately) and a sledge hammer to drive this spike into the ground. The twin bolt mechanism provides a secure fit around the wood and clamps in place which 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. Post supports enable you to secure fencing posts into the ground without having to dig or cement. Great to use in normal soil conditions. An adjustable box secures posts ranging from 65 - 80mm (nominal 3'). Manufactured from mild steel coated in hammerite to protect against surface rust.