The KT Pro EVA wave foam storage tray organizes tools in a revolutionary way. EVA (ethylene vinyl acetate) comes chemical, oil and water resistant. The tray has a unique wave pattern mold in order to hold tools securely in place. Made to fit standard tool box drawers. Has wrench sizes marke on the outside. Comes in 9-, 13- and 16-piece (metric) and 9-, 13- and 14-piece (SAE) varieties.