110x125x2400mm 8ft Recessed Concrete Fence Post. A recessed concrete fence post is one that is cast with a number of recesses to allow rails to fit neatly with the post itself. The rail can then be attached directly to the pre-holed concrete post using metal bolts. Recessed fence posts are used for closeboard or featheredge fencing. Using this method of fencing means the post is only visible on one side, providing an attractive finish. Typically, two rails are required for fences of 1.2m and below, with three required for taller installations.