TOUGHBUILT-STACKTECH 1 DRAWER TOOL BOXStackTech 1 Drawer Tool Box features an intuitive self aligning top that allows StackTech tool boxes and totes to virtually stack themselves. An auto locking interface ensures boxes sit securely, lock into place for transport, and easily unlock with a slide of the switch. A prominent lock indicator lets you know your stack is safe to move without second guessing. Accessing tools without unstacking is simple and intuitive with a self latching drawer.