Sizes marked on tabs for instant identification Patented spring tabs keep wrenches in place Made of tough Polypropylene plastic Low profile fits in 2 inch deep toolbox drawer Lifetime Warranty - Made in the U.S.A. Hansen Global’s Quik-Pik wrench racks organize wrenches while the clear labeling makes sizes easy to grab and go. Each tray pad printed with the following wrench sizes: 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm and 18mm.