These were the nut&bolt drawers from Orchard Supply Hardware; I bought some when they went under.
plastic drawers with adjustable dividers in a plastic rack. 3-drawers to a rack and racks can stack together with locking tabs on the top, bottom, and sides.
$15 for each 3-drawer rack or $40 for a set of three (9-drawers worth).
I have many of these.
Each rack is 12"wide, 12.5" high, and 16" deep (plus another part of an inch for the pull and lid tabs).