TOUGHBUILT-STACKTECH LARGE TOOL BOXThe StackTech Large Tool Box is a large capacity workhorse. It features an intuitive self aligning top that allows StackTech boxes and totes to virtually stack themselves. An auto locking interface ensures boxes seat securely, lock into place for transport, and easily unlock with the slide of a switch. A prominent lock indicator lets you know your Stack is safe to move without second guessing. Accessing tools is simple and intuitive with a one handed