http://www.actionwp.com/series-2-rive...

Action Wholesale Products' rugged, Series 2 Shelving is ideal for boosting storage space and keeping inventory under control. Units assemble quickly and easily, without nuts, bolts, or shelf clips so you'll be organized in no time. Double rivet beams used at the top and bottom create the ultimate in sturdiness. Action Wholesale Products' Series 2 Units do not require braces, allowing full access from all four sides.