These racks are designed for Harbor Freight compartment boxes. The larger one is for the Large Storehouse 24 Compartment Box, and the smaller is for the Small Storehouse 18 Compartment Box. The Harbor Freight compartment boxes are remarkably nice for an insanely low price ($4.99 for the large, $2.99 for the small), so it is hardly worth printing your own. But it's really handy being able to store multiple boxes in a single rack.

The racks consist of right and left hand sides that can be screwed to a wall, to a board, or as in my case, an aluminum plate. The vertical hole spacing on the large rack is 53.34mm (2.1") and the vertical spacing for the small rack is 39.37mm (1.55"). The horizontal spacing for the right and left mounting holes for the large rack is 319mm (12.56") , and for the small rack is 201.6mm (7.94"). The countersunk holes are 4.8mm in diameter for a 4mm or #8 screw..