Triton Products 5-600 LocBin Polypropylene Bin Wall Hanger 8-3/4-Inch L by 3-1/4-Inch W by 1/4-Inch H with Hardware, 2-Pack Bins lock together one under the other and four across for hanging up to six bins (3-210 and 3-220) vertically and 24 bins total (depending on weight) Top row of bins is mounted across the wall rail system allowing for easy removal to carry to the job site and then quickly remount to the wall rail when job is complete Two 8-Inch wall mount rails and all mounting hardware are included for easy installation Compatible with any plastic hanging bin