The term PENCIL-BOX ITEM can be summarized by two crossword solutions: RULER (5 letters) and ERASER (6 letters). A RULER is a flat, straight measuring device used to draw straight lines and measure distances. It is usually made of wood, plastic, or metal and comes in various lengths. An ERASER is a tool used to remove pencil marks from paper. It is usually made of rubber or vinyl and comes in various shapes and sizes. Both rulers and erasers are commonly found in pencil boxes.