Standards can be mounted to any type of wall. 82 series standards & 182 series brackets offer smooth & rounded corners, giving a softer & less intrusive appearance with out compromising the strength needed for heavy loads. The recessed groove design provides a streamlined surface where the bracket meets the standard. Double-lug bracket design helps prevent shelves & contents from falling if bumped. With a low profile, yet robust design, the combination of 82 Series standards combined with 182 Series brackets gives you a more visually appealing option to use in those areas of the home or business that you wish to infuse organization into the room without hindering its visual appeal. This system is a double-slotted standards & bracket combination to provide maximum stability & strength while giving you that designer-look & feel you have been looking for. Made in the USA from 14 gauge steel.