Each box has a carrying handle- positive pull-down locking catch. Box compartments feature high-impact styrene construction. Boxes feature strong- rigid- heavy-duty welded construction. Fits either four-drawer slide rack Cat. No. 54474 or six-drawer rack Cat. No. 54476. Boxes have a heavy- metallic-gray baked-enamel finish. Scoop-bottom design for easy parts removal and cleaning. Full-length piano hinged covers are designed to stay open for ease of access. Klein storage boxes are offered with a choice of compartment sizes and arrangements.