A grade
Used once. Clean interior walls, square corners, full stacking strength.
Used gaylord boxes
Graded, sorted and palletized used gaylords for manufacturers who move parts, resin and scrap all day and do not need a new box to do it.

Used once. Clean interior walls, square corners, full stacking strength.
Used more than once. Minor scuffing or repair, still sound for bulk handling.
Heavier loads, resin, metal parts and repeated stacking.
Lighter parts and shorter cycles at a lower cost per box.