Surewall is a slide together system that is not just quick and easy and install but also looks sensational. The Surewall system is the new look and way of building retaining walls (up to 1M) and can be used in many applications. The flush finish creates a smart, modern non-obtrusive wall. And no need for fasteners, saving you time and money. The Surewall Corner Sleeper Retaining Stake is ideal for securing garden edging such as sleepers.