Makes corrugated assembly easy and saves on shipping costs. Prior to shipping corrugated displays,Website:http://www.bestpakgroup.com, two piece shelf support clips allow for pre-attachment of "knock-down" sections. Male parts have holes for glue seep through and female parts have snap-lock features. Warning: Parts are designed to be used vertically and are not recommended for horizontal use.· Male and female parts sold separately· Fits up to 3/16" (C-Flute) corrugated· White polypropylene material· Packaged 100 per bag