Round post sleeves are matched to common round post diameters, so you select a sleeve whose socket suits your post, for example roughly 70 to 100 mm across. Measure the post diameter and pick a socket that seats it snugly; spike lengths typically run from about 450 to 750 mm.

A round post sleeve is driven into the ground with a sledgehammer, using a driving dolly or block to protect the socket rim, and kept plumb with a spirit level. It requires no concrete, unlike concrete-in anchors, which makes it a fast, no-dig option for firm soil.

Round post sleeves are made from galvanised steel, whose zinc coating resists corrosion when the spike sits in damp soil outdoors. This makes them suitable for permanent garden, fence and barrier installations exposed to rain and ground moisture.

Drive-in round post sleeves provide reliable support for round garden, barrier and light fence posts set in firm, compacted ground. In loose, sandy or waterlogged soil, or for taller or load-bearing posts, a longer spike or a concrete-set support offers greater resistance to movement.