Ultra Shore is made of a specially corrugated lightweight aluminum. It is easy to use and lightweight enough for one person to lower a single pair of assembled panels into an excavation. All panels can be used horizontally or vertically and are stackable. This allows them to be safe for bury depths up to 12 feet, even in class C soils. Spring-loaded end panels allow for three- and four-wall applications. Leg kits and wheel kits add the versatility many plumbers, municipalities and utility companies require to meet OSHA regulations. 800/746-7464; www.shoring.com.